I own the 1010 Music BitBox. I dig it for sampling modular... since it is modular. It's pretty simple to use and can record pre-specified lengths (when properly clocked).

The BitBox is also compatible with Ableton Live. You can load a 4x4 grid of samples into Ableton as a drum rack. This is nice for processing samples afterwards.

The language is also edible in a text editor, so swapping out samples or building new kits off-line is pretty easy.