For me it's not the sleep. I'm still pretty bloated, which I think is either the Crinone or late onset moderate OHSS. I was HUGE after EPU (27 eggs), but it went away after about a week. Then a few days after transfer, BAM - hello again bloat. It's pretty grim.
That and I'm quite tight in the chest at night - like I can't get a full breath. Dr. Google tells me that while not massively common, it's not unheard of as a side effect. It's worse at night and in the morning, so unless I'm really struggling to breathe, I'll stick it out until I have my 7 week u/s with my FS. FN didn't seem too fussed when I told her.