This is a very versatile tool for shaping and tayloring your desired bass-sound, with options and solutions to a wide variety of setups. Fantastic multifunctional tool for bass. I have used it with gitar once in a live-situation. Sounded deep and wonderful! It is supposed to be an Ampeg SVT amp, if i remember correctly....
I also bought the tech 21 VT bass, also an Ampeg SVT simulation, and its a much more aggressive and «fun» tool. I ultimately ended up using the tech 21 all the time, because its easy to use, and sounds insanely cool.
If you like versatility, go for DSM. If you like rock and metal, definitely go for tech 21(tech 21 runs on phantom-power...... its just super easy every time)