I've got a wipperman 10 speed removable link but I'm not sure if its really supposed to be reused. I'm going to use it until it fails me pretty much.

I've also got some SRAM powerlinks but when I went to install them they were so tight that I thought I might never be able to get them off so I didn't lock them on.

My 9 speed SRAM removable links work like a charm over and over.