Totally re-usable and actually faster to remove than the standard clip type assuming you have the tool.
still- I would buy a few of the KMC standard track masters and use those, since all you need is a flat head screw driver to change them, and it's clear that they are installed correctly.
ive got those masters on my road bikes (a 3/32 and a 10speed chain) and they work great.. But not my first choice for track