We also used IVFA. Used DP's eggs (also a SS couple). She was 39 at the time and had very low AMH for her age. We weren't expecting our cycle to be successful but our FS was hopeful. DP had 6 eggs, 4 mature, 4 fertilise and one make it to a day 5 blastocyst. ONE. It was frozen and later thawed for me to carry. I had so much faith in their preservation techniques that if it wasn't for their technology that embryo could have easily not survived. Fast forward and it's now our 11 month old.
Definitely comes down to the FS and their individual approaches. We also found the admin and nurse staff beautiful and will definitely be going back for our second.

And FWIW, the egg pickups not being every day wasn't an issue for us.