I bought this to be able to practice when I'm not home, so all I have to pack is my ipad, this gadget, my iem and my bass.
Comparing the sound quality to my Line6: It costs less (about half price), but it sounds much weaker, the signal is quite noisy, tested with a lot of cables, the Line6 is dead silent (not a ground problem on the bass, I checked with my amp as well, and it is silent). Overall I was expecting more bang for my buck, but for ad-hoc practicing, it will be adequate.