I'm interested in this topic when it is not overly sensationalized, and there are many previously shows that are way over the top. Over the top in terms on how it is narrated and also is just showing very weak evidence but taking leaps in logic. So it gets a 5 star for a massive improvement in how it was presented relative to others.
I didn't like the parts of the show when meeting experts or eye witnesses at the side of roads, parking lots, etc. Getting out of the car and just start talking about it, it's like they were not taking this seriously. Possibly they didn't have a budget for a studio.
The first episode of animal mutilation I found interesting as they show some real mysteries. I also like that folks refrained from attempting to fill in the blank but providing just the facts.
On the other hand the underwater scan with non-human shapes really was a stretch and no investigative questions were asked. Often it felt that during the interviews that Knapp was looking for his own validation and not being objective in asking the hard questions.
I didn't like the AARO counter report, the attempt to find solid information was a complete miss. We already have the information, I think the Phoenix Lights itself is more than enough. Witnessed by thousands, what is needed is acknowledgement that something happened that was far, far superior to our current understanding and capability.
Overall the series was OK but due to lack of budget I assume, it needed better experts, better places to interview people (not outside your car) and less speculation and more facts.