Yes, we had a great result with Dr. Potter. I chose him because there was a lot of success with him on this board at that time, and he had a lot of experience with elective sex selection via IVF in fertile patients. His clinic also offered MS at the time (no longer available in US). However, choosing an RE is a very personal choice.
Another popular RE on here in California is Dr. Lin. I suggest you shortlist 2-3, consult with each, then make a final decision.