I need to step in for the Blitz here.
I really like mine. I like the thin blade stock (2.5mm) and whilst it took a while to get it there, the I have a very good edge on mine and the Benchmade 154CM is well treated. I really like the simple shape of the handle, no funny scalloped quasi choils or weird bumps and things that force my hand into a grip. It fits MY hand really nicely YMMV. I'm not wild about the glossy G10 finish but I can live with it. Tip down, right side only works perfectly for me but I can see it as a negative for a lot of folk.
I'm agnostic on the assisted opening, I prefer manuals but the assist here is just something that is there - not good or bad, just there. I've taken out the roller on the Nitrous system on my Torrent so it shouldn't be a problem if you really want to de-assist it. There looks to be a detent ball but I'm not going to vouch for the strength of the detent without the spring.
Overall I think the quality is that of a good $100 knife. Fit and finish is fine, blade is centred, no blade play and its got that nifty hexagonal stop pin that can get rotated if you want to fiddle with the lock up.
Big positives for me are the comfortable handle, thin(ish) blade stock and Benchmade 154CM which, like VG10, I like as an easy maintenance steel.
As for the other HK knives and their quality - I've had no problems with my Alley or a Mini Ascender - both some of the better made Chinese manufactured knives, nothing special and you get what you pay for. HK has mostly black blades if you like that sort of thing (the Blitz being one of the few that is also offered in satin finish and a plus for me).
I'll recommend a Blitz to a friend and will probably pick up another one for myself at some point.