I got the GDiapers for my son and use them exclusively, except at night. We use 1-2 disposables at night due to the amount urine and he seems to sleep more comfortably at night in disposables. As for using prefolds in them, yes you can, but wouldn't try until you get to the med/lg sizes of diapers. I rarely use the flushable inserts, as I find that the cloth will work very well if he is changed regularly 2-3 hours. I use the prefolds in the G's about half the time. I have more than a dozen of the small g-cloth inserts and found a prefold cut down will extend the use of these in the med/lg diapers.View Thread