I use cloth on my 14 month old during the day and some of what we use is BG. I rarely have any leaking problems. Are they brand new? Did you wash them per instructions? Also, I don't use them at night cause he wets too much. I use sposies at night rather than put huge bulk in a cloth diaper, which is really what you have to do to use them at night. 2-3 hours is usually what I get out of a cloth diaper, maybe 4 if he isn't wetting too much. The BG I am familiar with does not have anything sewn in. There is an internal liner but you are supposed to stuff them with a microfiber insert. I liked the BG for when he was little, but now we use more of the prefolds with a seperate cover, they just seem to fit him better. The BG do fit and work, I just prefer the prefolds and I feel like I can get them cleaner, where as the BG tend to take on some funny smells sometimes. My boy is 24 lbs, wears mostly 18 month and I do think they will work a little while longer. I don't know if it will go all the way to potty training, but I can see him wearing them til almost 2 at least. If you do decide to try prefolds, they do make the seperate sizes so make sure you size up at the appropriate time. The standard prefold size was getting tight on my son about 10 months and I almost stopped using them cause they were such a struggle to get on. But then I ordered the brown edge toddler size and they fit MUCH better. I get my prefolds at green mountain diapers, they are excellent quality. Right now I am using mostly litewrap covers in size large (20-30 lbs) and they work great. I also have used swaddlebees abc covers when he was a little younger (medium size) and those worked well too, but when I got the bigger prefolds I ordered a few bigger covers too. I don't use cloth all the time, when he has a bad rash and I was to use desitin I use sposies so I don't ruin my cloth, and at night and when we are traveling I use sposies, but it still seems to save us money and I feel like I am making an effort towards not polluting the environment so much.