Totally blown away with the sound from this amp, would have given a 5 on features if it had effect loop. Build quality seems great but only gave 4 as it had a flaw with the vinyl covering which was not applied properly at corner of control panel, apart from that all good. Not having the effect loop is no big issue really, to be honest it sounds so good i wouldn't want to add effects, maybe just use with an overdrive pedal to boost, or maybe an ABY box if playing live with it. It is also great for playing at home as you can still get amazing sounds at low level volume which is a bonus. Just loving the pure sound coming out of this thing, Overall though it is an amazing sounding amp, build quality is great and the service from Thomann has been first class. Can i just point out also that i am in the Uk and no problems with the delivery by Dhl, had no import taxes to pay just as Thomann said there would not be, excellent!