The idea behind this product is great. It is relatively sturdy (for plastic) and the controls work great.
The fact that you can mix both music from a pc/phone, with your bass, directly into your headphones is absolutely fantastic.
However!
The sound is downright bad. There is a lot of background noise. Turn the gain above 2, and it keeps on getting worse.
The built in "play along"-loops are worthless. Dont bother.
The fact that it does not sound like a 500£ amp i accept, because it is not worth 500£. But the sound should at least be noiseless!!
TL:DR
Physically, its a great product. Sturdy(plastic) and easy to use.
Sound wise, its crap. The actual sound is dull and dead, and the background noise is VERY noticeable.
The extra features are useless, except the extra mini-jack for play along from PC/phone.