I owned one of these for a short time, and for the money I thought it was a very good knife. First off, it was designed as a fighter pure and simple. I would not pry or chop with it at all - hatchets and prybars are MUCH cheaper than knives. I didn't find it that heavy, but I'm not a small guy (6'2", 215 lbs.) The blade steel isn't really all that great. I used mine for daily utility for a while and it got sharp easily, but didn't hold the edge long. On a self defense knife, all that matters is that the edge is sharp when you need it, and you know how to use it.
Overall, I think it performs well for what it is - a cheap, well made self defense knife. I think the design is great! If you like it a lot, get a better sheath made for it.