I remember handling a Blur. I can't remember if it was owned by someone I knew, someone I simply met in passing and chatted with knives about, or if it was in a passaround here. I like assisted knives with flippers well enough, but I've never liked them simply by using thumbstuds. Seems like a good way to slice the $#!+ out of your thumb by accident. I remember the Random Task was especially bad (the thumbstuds were too short, meaning you had to dig in to move the blade, and it was easy to cut yourself). I know the Blur isn't that bad, but I'm still not a fan. But I've never had a knife in M4, and as you say, $75 (nearly $90 with tax and shipping) is too good to pass up. I can always sell/trade it if I don't like the thing.