Congrats on the move. I too just moved from Los Angeles. Here is my take on Thrive Prenatal:
The studio itself is gorgeous- stone floors, waterfalls, etc. Very peaceful and nice. I find the prices reasonable.
The teacher (Susan) is mediocre in my opinion. Please note, however, I consider myself a "yoga snob" so this is coming from someone who is very particular! She does an adequate job but I would love for her to make more adjustments on people (she basically does the class with you and I feel like she forgets she is "teaching" and not just practicing). I find her energy a little flat as well.
With that being said, however, I would still recommend the class b/c it is a nice workout and stretch. There is another teacher on Wednesday nights but I haven't tried her yet.
If you have any questions feel free to email.