I took the Beginner Reformer series with Katrina and it is 5 Stars! The class was full - 8 beginners - but she did not have a slightest problem running around and paying attention to every one of us.  A super neat thing about these series is that if you miss a class then there is make up/bonus class, which, if you signed up for the series you can also purchase as a bonus for a discount. That came handy to me given that I could not attend one Tuesday - but I loved this series so much that I would buy the 7nd class anyway :) Katrina is very knowledgeable and experienced in all things Pilates, and I'll definitely try to take another series at this Studio - and they usually fill up fast so if you are thinking about some of the series then don't overthink it, they're a great idea and you will love it!