Feature:
Yes the amp comes with a foot switch, I use it a lot from moving back and forth between the reverb and treblo and or both in my kind of music.

Quality:
This is where I fall off with Gibson..For a hand built amp, there should be a higher quality control from the factory. The amp has a double power switch, from about 40% power to 100% called a Triode and Pentode modes of power..It is this switch that is bad, and can cause the amp to blow or short out the tubes at a cost of over 100.00 for tubes alone.. Keep this in mind when useing this switch or buying the amp. ALWAYS set the switch to the desired mode, before powering the amp up..NEVER switch while the amp is on..sometimes even in the stand-by mode will have problems when making the switch.

Value:
I think the GA40 is a little over priced..most people who play don't have that kind of cash, unless they are making money with their music. Its a great studio amp, or just playing for fun, and most guys/gals won't spend a $1000-$1150 just have a amp to use for fun....

Desirability:
Its a great sounding amp, the looks are better than most give it credit for.

Sound:
This is a fine amp, with a great sound..a tad over priced in my opinionm more in line of say 699-799 dollars... however, I like the way it sounds for playing oldies style of music.. I owned this for just less than 1 year before it blew it's top...

Ease of Use:
The amp is limited with some things it can do and can't do but ts over performence is pretty good..

Support:
Yes, I have delt with Gibson, they are great in making amends to problems. A little slow on turn arounds with factory repaires.. The first time I used the " warranty" I ship my GA40 amp to the Cincin, Ohio area for repairs..9 weeks.. Then the amp still wasn't right, so I called Gibson back..They did not give me any problems at all...in fact They gave a brand new bigger and better amp for my problems I went through..the Brand new GA42..thats twin 12" speakers and a great amp I must say.....

Overall:
This is where I have been so disappointed in the GA40 Gibson amp.. I bought this amp , thinking it would last me the rest of my life, the way I use it and babby it.. When the amp broke down, just less that a year old..the dissappointment was hard to take..I have another Gibson amp I bought new in 1975, still works like new, looks new and sounds great.. I have tried the other name brands, but nothing can give you the sound like a Gibson amp. That's why I keep buying and using them.