One of the guys I work with has a Ravenscrest. It seems stronger and locks up better than the Microtech otf's that I have seen.
I bought one for my wife's knife collection. Yes, it's hers. LOL.
I'm cheap, so I bought a Kershaw Launch 5, and have been carrying it. I really like it thus far. Is it as durable as my ZT? Doesn't seem like it, but I do like it.