Did you do a sleep study -- Yes several now: Diagnosed 12 years ago when hospitalized at my sons birth.
Do you have sleep apnea -- Yes
Has weight loss helped with the sleep apnea -- Yes. I know over the years as I have done the yo-yo dieting. My apnea went right along with it. Becoming better at lower weights and worse with higher weights. hopefully after the band and off the yo yo I wont need the CPAP anymore.
Did your surgeon require this -- dunno not got my approval yet.
Do you like the cpap machine, if you have one -- YES!!!!!!!! It's my best friend. lol
I cannot sleep at all without it. If I travel it travels. And after the last couple winters.. Where we have had power outages that have lasted for 1 day to up to a week. I even have a spare car battery, adapter so I can sleep!

or go camping if need be. lol
Are they expensive -- oh yea 1500.00 up 3000.00 But you can sometimes get them used (online) and insurance usually covers most of it. And Some companies will rent them to you. Or used to.
Did you feel more rested after using a cpap -- Oh yes, I was lucky I took to the machine instantly. And loved the change it made. But I had went so long undiagnosed that my short term memory was affected. Badly.
A interesting note. Both my ex-husband and my current boyfriend (7years! Woot) were just as addicted to the machine as I am lol.
Why? White noise. Blocks out 90% of the little annoying sounds that can keep you awake. So if he needs to sleep and I am not in bed. The Machine is on anyhow.
My machine: :whoo:
REMstar® Pro M Series with C-Flex™, Respironics