If you have an insatiable nostalgia or obsession for France, French cooking, and of course Julia Child, this show will definitely be well received. You won't actually care about semantics; there will be no impetus for critique. If you take a (very tiny) step back, however, you'll easily be disappointed. It appears that many of those who rated the show 10/10 are either motivated by a prior personal experience in France, with French cooking / identifying as a "foodie", etc.
I have personally made many Julia Child recipes and I find her to be endearing to watch; I often pull up even her original cooking show from the '60s. This is what motivated me to watch the episode. What I saw, however, was a reality show about an expensive destination cooking experience. I found it to be a well-made advertisement. For example, I was expecting there to be more details on food, ingredients, etc. I wanted to learn from the show, but can't say I did. That was disappointing. Perhaps because I've already watched Julia herself (even still, I'm far from a chef). There were a few cooking tidbits here and there (which weren't personally enlightening), and I couldn't get past all of the "testimonials" from the guests about how much their lives have been changed from this experience and how grateful they are to the owner. It comes off as insincere to me. Not to say their emotions cannot be real, but the repeated on-camera accolades to the host is off-putting (as if they are real guests and not customers paying nearly $10K). In other words, and in summary, I got the impression that the "guests" were carefully curated to play in this 43 minute Instagram-esq add for the cooking school.
Last but not least, I was left with several questions. How was this show picked up by HBO? Are the owners just simply riding off the Julia Child name? Do they have a personal connection to France? Why does the owner, who says she went to Le Cordon Bleu, come off so green in the kitchen? Did she go to Le Cordon Bleu just to have a résumé for starting the school?
*Addendum: after finding a couple articles on the owner in Vogue / Boston magazine, most of these questions can be answered. Look her up.