... the Tech 21 SansAmp GT2 is a powerful tool for the toolbox!
Geared for guitarists (and this thing REALLY shines on guitar), bassists are able to quickly dial up a variety of dirty and clean tones by just flipping a few switches. Everything is pretty self-explanatory -- you have an array of switches that allow you to choose between amps (Fender, Marshall, Boogie), cabinets and mic placement. Then, you have standard knobs for level, volume, high and low. Quarter-inch ins and outs and a single master footswitch complete the pedal. If there's one word that describes the GT2, it would be "easy."
If I could tweak only one feature on this pedal, it would be the switches in low-light conditions. Black-on-black is tough to see in the dark. If you're not switching things up a bunch, the switches are good to go. But it would be great to throw some glow-in-the-dark paint on the switches and labels so that you have a better idea of where you're at when the lights go out.