I had one for a while and thought it was pretty ordinary. Mine was manufactured in China. Quality was OK given the price but you can do a lot better. The knife is relatively small, particularly in the grip which may be a problem if you have large hands. The blade is designed for sticking or stabbing and while it can do other things, again, there are better designs around for general purpose use. It comes with a gimmicky sheath arrangement that has a shoulder holster style carry option.
The one I had didn't do much for me and I sold it after a relatively brief period. Having said that, and taking into account the above limitations, there is nothing fundamentally wrong with them. It really depends on what you want it for.
Hope that helps.