Overall I love this amp. You can not go wrong with Ampeg. This amp has great tone and plenty of power. And in this price range this amp can't be beat. I would absolutely get this amp again if something happened to it.
The controls are mute and -15db buttons, compressor, gain, ultra hi and low buttons, EQ bass, middle, 5 position mid-range selector switch, treble, FX mix and volume knobs.
Everything is straight forward and easy to use but I would have liked to just have a low mid and hi mid knobs instead of the mid-range frequency switch. At 300w at 8ohms and 500w at 4 ohms this has plenty of power for most any gig.
You are not going to find an amp with much better sound in a solid state amp. All that great Ampeg tone is there with this amp.
Ease of use is no problem with this amp. You can easily dial in the tone your looking for no matter what type of music you play.
So far it seems durable enough.