I have a few questions for owners of the Ceriatone Overtone amp. . Are all of the components top shelf or are there some that could be of a higher quality? If so, please explain. . Anything you don't like about the amp? . What changes or additions would you do if possible? . Is the amp more than a one or two tick pony? . If familiar with the other well know OD amps how does the Overtone stack up against them both good and bad?