Well, pretty much everyone owned the zapper. I could never get it to work for me, but maybe it was my TV or something, because it worked for my friends. I had the Powerglove, it sucked ass. But it could cause some interesting glitches in some games, so it was at least fun to fuck around with, but it certainly didn't work to play games easily/normally.
I had friends that had the track mat and Super Scope 6. The Super Scope was meh, but the Yoshi shooter was pretty awesome. I liked my Sega Menacer better though for some T2: Arcade Game goodness.