I'm not going to lie here, I'm in mixed minds about them at the minute. On one hand, I bought a Hulk which was tremendously over powered and to this date have not had one problem with. But on the other hand, I've bought a Spartan BP and since the day I bought it, I've had nothing but trouble with it. First unit, DOA, tail cap wasn't working properly and got jammed, lost a battery in the process. Second unit, worked for a couple of months but started mode hopping and the second battery they supplied me with wasn't working correctly. Third unit, arrived with a big scratch on it, no warning sticker, tail cap didn't work properly which got replaced. Is nicely powered and inherently stable, so I can forgive the scratch which can easilly be covered with a 473nm warning sticker (THAT I'M SUPPLYING MY SELF WITH).
Overall I'd say if you're buying a green laser, you're good to go. But anything else other than accessories is touchy ground. I love the Spartan BP to bits, it really is a solid laser when you get a good unit. But for all the crap I went through over the time since I bought it (March/April), deffinately wasn't worth it.