This episode is typical of the early seasons of TNG in that the episode overall is very good, but there is a chronic amount of sloppiness in the writing and the details are so poorly handled that it detracts from what is otherwise a great story.
The good:
-Great first look (for TNG, anyway) into Klingon culture and Worf's personal history
-Though it is irrelevant to the plot, the bit with Geordi's visor is a fascinating look into his character and the technology of the 24th century
-Vaughn Armstrong's character is well written and very convincingly charismatic
-First reference in TNG to the Romulans (though that leads nowhere...at least for now)
-Our first Worf-centric story--the first of many for what is probably the most well-developed character in Star Trek history
-A somewhat cool action sequence
The bad:
-Michael Dorn has not yet grown into his character fully, resulting in some poorly-delivered lines. In particular, his dialog in the climactic scene is somewhat cringe-inducing
-The action scene, though kind of cool, is also very poorly done. Starfleet officers would NOT have the phasers set to kill in that situation, and their tactics make the Jaffa from Stargate SG-1 look brilliant by comparison. Scenes like this make me think it was wise for TNG to avoid action sequences for the most part in the early seasons.
The ugly:
-Data says that this is the first time "outsiders" have witnessed the Kingon death ritual. I find this to be highly unlikely. The Federation and Klingons have been on more-or-less friendly terms for decades at this point, and the Klingons have been allies with other races at various points in the past, including with the Romulans and with the Ferengi. It's not like the Klingons are a secretive or xenophobic race. And Q knows, they are dying all the time. Just a silly line of dialog, and unnecessary too.
-Korris crashing through the glass in engineering after being shot by Worf. People walk and even run on that glass all the time. Why would they make it so flimsy? It's a silly moment that is meant to be dramatic, but just makes me chuckle instead. I'm guessing it is supposed to be a homage to the end of Undiscovered Country when the guy disguised as a Klingon gets shot by Scotty and goes crashing through the glass. The reference is neat, but poorly executed. (EDIT: I realized after writing this that Undiscovered Country didn't come out until four years after this episode so it can't be a reference to that. Which makes the silly scene even worse, unfortunately).
-Getting visual on the Klingon ship from many light years away. Data states that the ship is too far away for his sensors to even identify it (even though Klingon designs are very familiar to Starfleet), and yet seconds later they are able to get a visual that is clear enough to make that determination. The range for visual images on the 1701-D seems to be portrayed inconsistently throughout the series, but one thing is for sure, if the human eye could identify the ship, the sensors sure as hell should have been able to.
-It bears mentioning again: the Starfleet phasers being set to kill is completely nonsensical and lazy/sloppy writing.
Overall a good episode, and great tone-setter for countless future episodes involving Worf, the Klingons, and even the Romulans that will be carried all the way through the Dominion War.
7/10
The good:
-Great first look (for TNG, anyway) into Klingon culture and Worf's personal history
-Though it is irrelevant to the plot, the bit with Geordi's visor is a fascinating look into his character and the technology of the 24th century
-Vaughn Armstrong's character is well written and very convincingly charismatic
-First reference in TNG to the Romulans (though that leads nowhere...at least for now)
-Our first Worf-centric story--the first of many for what is probably the most well-developed character in Star Trek history
-A somewhat cool action sequence
The bad:
-Michael Dorn has not yet grown into his character fully, resulting in some poorly-delivered lines. In particular, his dialog in the climactic scene is somewhat cringe-inducing
-The action scene, though kind of cool, is also very poorly done. Starfleet officers would NOT have the phasers set to kill in that situation, and their tactics make the Jaffa from Stargate SG-1 look brilliant by comparison. Scenes like this make me think it was wise for TNG to avoid action sequences for the most part in the early seasons.
The ugly:
-Data says that this is the first time "outsiders" have witnessed the Kingon death ritual. I find this to be highly unlikely. The Federation and Klingons have been on more-or-less friendly terms for decades at this point, and the Klingons have been allies with other races at various points in the past, including with the Romulans and with the Ferengi. It's not like the Klingons are a secretive or xenophobic race. And Q knows, they are dying all the time. Just a silly line of dialog, and unnecessary too.
-Korris crashing through the glass in engineering after being shot by Worf. People walk and even run on that glass all the time. Why would they make it so flimsy? It's a silly moment that is meant to be dramatic, but just makes me chuckle instead. I'm guessing it is supposed to be a homage to the end of Undiscovered Country when the guy disguised as a Klingon gets shot by Scotty and goes crashing through the glass. The reference is neat, but poorly executed. (EDIT: I realized after writing this that Undiscovered Country didn't come out until four years after this episode so it can't be a reference to that. Which makes the silly scene even worse, unfortunately).
-Getting visual on the Klingon ship from many light years away. Data states that the ship is too far away for his sensors to even identify it (even though Klingon designs are very familiar to Starfleet), and yet seconds later they are able to get a visual that is clear enough to make that determination. The range for visual images on the 1701-D seems to be portrayed inconsistently throughout the series, but one thing is for sure, if the human eye could identify the ship, the sensors sure as hell should have been able to.
-It bears mentioning again: the Starfleet phasers being set to kill is completely nonsensical and lazy/sloppy writing.
Overall a good episode, and great tone-setter for countless future episodes involving Worf, the Klingons, and even the Romulans that will be carried all the way through the Dominion War.
7/10