I bought a 150 very lighted use online, mint condition. As a stereo buff and a guitar player, this sounds a bit weak for 150Watts. On the guitar side, I need to remind myself that with a tube amp, every bit of the circuit is the instrument, where a modeling amp synthesizes the tone then amplifies that sound with absolute clean transistor fidelity. It won't be as loud or have the same response as its tube counterpart. Having the control of the good stuff on this amp hinged upon iOS, is actually a hidden expense for those who do not have such a device. Cumbersome, it is not the most clean app, though it is better than having to delve through hidden menus one a screenless interface. On the the stereo side, it works well. Hook up is simply and pleasant sounding until one tries to play it loud. Again, I thought 150 watts would produce more sound pressure. For the price, I would not buy this as a guitar amp as I do not need so many effects(many of which are kind of useless, in my opinion), it has that sterile digital response and it is not particularly loud. One would do better with a 15watt tube amp and move their pedal boards from their main rig to the practice amp. As for a blue tooth remote speaker system, it is not as loud as I though it should be. That said, it sounds better than many of the comparably priced systems. This is why this thing works..... It is perfect for a bed or dorm room and can be dragged out for background music outdoors. Add to that, is a serviceable practice amp. I am on the fence on keeping it, but might recommend it to someone who needs such a niche product. Namaste, David