I use an Apple keyboard and a bluetooth mighty mouse when at my desk at home. I toss the mouse in my bag and use it occasionally on the go as well. I really like Apple's new aluminum keyboard.
+1
The trackpad is okay, but I personally just find it easier to use a mouse. So when I can, i do.
Same for the keyboard. If I'm at home, using a full size keyboard is just more natural for me. The keys on the mBP are nicely size, but the cramped layout can slow me down.
Also... I can tolerate the rough plasticky feel of the MBP keys, but I could do without it, too. Having a bluetooth keyboard with a better feel helps.