Just bought this and I'm EXTREMELY delighted. It's a great concept and I can't find a flaw. Previously I was running my iphone through my amp, and using headphones from my amp to play along for practice. Unfortunately the music from my iphone went from stereo to mono by going through my amp, and also seemed degraded a bit. It made discerning the bass track much more difficult. The Vox gives me nice clean stereo from my iphone and great sound from my bass. Also I am no longer tethered to my amp when I practice. For $99 it's totally a no brainer.