I don't know about "best buy", given alot of other knives that are available (CRKT, Spyderco, other Benchmades). However; I have two (one large and one small, both ATS-34), and I carry the small one at work daily. I didn't have the grind uneveness and (lack of) sharpness issues that have been mentioned about Benchmade in other threads.
Regarding the full size AFCK, I haven't had any problems with it. I like the way the handle is thicker (than my Spydie Military). The full length liners give me a sense of strength, although I think that my Military is just as strong for cutting applications. I'd like a little more finger choil, but on the full size, it's not as much an issue since I'll just use a smaller knife instead. The blade geometry is great for slicing, and the steel has met my expectations of a harder stainless (well, stain resistant). I haven't had any problems with play in the blade, but I'm a "right tool for the job" type, so I only cut and stab things with it.
Despite the fact that I rarely carry the full size AFCK any more (the Military is my large folder of choice) because the pointy-ness of the handle rubbed holes in my jeans' waist area (carried clipped behind the right hip), I won't sell or give away the knife since I like it too much. If you like it, you're getting a great knife.