My doctor believes that I have sleep apnea and has scheduled a sleep study in March. The information the sleep study center has provided is very thorough, but I wondered if anyone has any words of wisdom based on personal experience. Also, if I do have sleep apnea--and I think I do (that and cats who wake me up several times a night )--I'd be interested in any experiences with CPAP machines. I've read there are some that are better and/or more comfortable than others.