Any one use Tap-O-Cap?

[docone31]

I am looking at getting a Tap-O-Cap.
Are they at all worth it?

[waksupi]

http://castboolits.gunloads.com/showthread.php?t=3173&highlight=tap&page=2

[Old Ironsights]

I have one. It works. It's not pretty, it's not fast, and works better if you know how to brew fulminates, but it works as advertised on caplocks with well exposed nipples. The Tap-o-cap caps will NOT work on any C&B revolver I've tried...