I only have experience with thier extreme ops line of knifes. They are cheap but are massivly crappy. If thier MP line is anywhere near the same quality i would say "hell no" as defensive carry folder. A quick glance suggests the MP line is in the same price range, i wouldnt get my hopes up.

Also, i have handle quite a few S&W knifes at gun shows, all of which sucked baddd. But they were all under 40 bucks.