We were limping along using the AIO snap in inserts for a booster for the ONES on overnights, but this is the solution we needed! Super absorbent without bulking up the diaper too much and no leaks! Not sure there is any real advantage to these over the other booster pack, we got both but honestly haven’t noticed a difference in using them yet.
My 16 month old must just have a lot of pee because if she goes for more than 1.5 hr, she's almost guaranteed to leak. I tried these boosters to see if they could help us stretch the time between diaper changes. It's a little work to prep them for use (washing and drying several times) - I think I've been spoiled by Grovia's other no-prep products - but now that they're in our regular circulation, they've been great. Still can't push it too too long but now we don't have quite so many leaks.
I have four boys and have cloth diapered three of them. I was a Kickstarter backer for the ONE diaper and said if I ever had another child then my diaper stash would consist mostly of them! That being said, I had tried AIO with my second and third boys and found them to not meet my needs as far as absorbency and I was sad. I really like them! My fourth boy I decided to try them again with him (my stash is largely ONE's) and I had a few boosters so after getting leaks I tried the boosters and they've been a life changer! They are very trim and do not add bulk to the AIO which is the main reason I think a lot of people use them, because they are so trim (the diaper). I've since added a fair few of the boosters and AIO to our growing diaper stash and will continue to do so. These boosters are very soft and great at keeping a lot of the moisture away from little baby bums.