I've had the HCigar Hammer for about 4 months and I like it a lot, however the spring in the top cap failed. I replaced the top cap with a Chi You top cap from Fasttech. I also got a Chi You kick sleeve from them so I can use a kick with it (the Chi You kick sleeve is slightly longer than the one supplied with the HCigar Hammer and makes fitting the kick easier. You will have to fiddle with the contact on the top cap (I had to shorten it) but it will depend on your atty.
Best thing about the hammer... it doesn't fall over when you put it down, not even when you knock the table its sitting on.