These are very sturdy and hold the prefolds well. Mine are new and work great so far but did read they will eventually break with usage, which I guess is to be expected due to constant stretching.
I'm new to cloth diapering and prefolds but the snappis were very easy to figure out and feel very secure! Super happy with them
I have a set of these I bought with my 3rd child and love them. They stretch some but not too much. I don't know if they get brittle from constant use or what but they do break over time. But they grab most materials well and will hold them just as expected. I will use them again with my 4th child in a few months.