Hi Dave,
I purchased the original Nanopad when they first came out. IIRC you can program them for different notes or CC#s. The velocity sensitivity was just as good as most midi keyboards and I believe? you could use the editor to also define the range of the velocity. For the size and price it would be hard to find anything like it.
The only problem I had is that the pads are kinda cheap gel/rubber material and they will take a form. I made the mistake of putting mine in the box and storing it with an old Sonar manual on top of it for a few months. When I removed it to use again the pads did not work very well. I was able to search the net on how to repair the pads and it did work. I really had no idea they would take a set like they did.
Long story short, The NanoPad does work for its intended purpose, its small, and it is cheap/inexpensive. If you have not used any of the Nano series the driver setup is a little weird for a 64bit install but you only have to go through it once. (actually, you need to load the drivers twice. :)
I still use the NanoKontrol frequently to control Omnisphere, the NanoPad rarely, and I wouldn't recommend the NanoKey to anyone.
Kind regards,
Rick