My Sansamp BDDI is essential, it gives me a DI to the PA, a preamp with a "rich flavor" I like a lot, 2 outputs with the preamp + one without the preamp. I have used it 1) with no amp, direct to the PA, using stage monitors to hear it, .......2) with my amp set clean, giving me all Sansamp sound, 3) to record with, using only that and my bass, 4) as a pedal with my amp for a second very different sound, 5) as a splitter to send signal to 2 different places, or even 3 places. On the negative ..it can get noisy with settings cranked up, (so can an amp), as a straight up DI it's ok, there are better ones for $200. Bottom line..it's a good, versatile tool, and quite portable. If I had to choose between the Sansamp ($200), and a combo amp for ($350), like my Carvin MB210...the Carvin is a bargain, a good complete setup usable in any situation, (with PA support), and good enough alone a lot of the time., the Sansamp is not.