I bought this as it had so many effects and Amp types built into it,
the app works nicely occasionally i have to reboot the amp, not sure if its a software bug but this is a minimal inconvenience.
The sound quality is very good, the effect options are many, i use with the GTX-7 foot switch and it works perfectly. Does everything i need, due to the USB i record direct to my PC with no real issues, for me i found this AMP very good especially for the price.