The Sentinel is actually a very cool knife. The tip is quite strong, and so is the handle. I would rate it as tied for second with the Gerber Covert behind the Benchmade AFCK as my favorite production folders. The newer ones come with a single-piece back scale that doesn't snag pockets.
There have been some problems with the locks not seating well on the BT2 coated knives. I recommend a buy if you like them, but check it out in person first or ask the seller to check the lock before shipping.
If you get one with no problems, they are about the coolest production folder going. Very interesting design, very versatile as a cutting tool also.
Harv