It is pretty thick, but very hand filling. I think they're the best FRN scales ever made (really). The scales, for once, even look pretty high quality. Think Kershaw Bump/Spec Bump 3D modeled stuff for thickness...but it feels really good. I didn't have any problems with the *thickness* either in hand or in pocket.
However, there's something you should know. Spyderco makes some of, if not the, best ergonomics out there. Perhaps as a biproduct of this (and maybe not) Spyderco seems to like the handle to only enclose the actual edge instead of the whole blade. This is sort of annoying to me from a design standpoint, not to use all that space in the handle makes the knives noticeably wider (closed), but hasn't caused a problem. The D`Allara, however, has taken this too far, making this an exceptionally wide knife when closed. The ball is also too recessed for my tastes, though I bet I'd adjust. It also might please SD nuts who have long criticized the axis lock for the potential for an opponent to disarm it....that would be extraordinarily difficult to do in a struggle with the D`Allara.
This is the best deal Spyderco offers in their entire line, I feel safe in saying. It's too wide when closed, period, but this knife offers so much.
I don't expect the handle width to be too much...it's noticeable, but not a big deal.