they have all been well made and fairly easy to dial in, reverb is nice on the ones that have it. ive used a few as back line amps and plugged into my friends amps. i loved the rt66 when i used it at an outdoor gig. theres a bunch of models and i sure havent played them all and i havent heard one that would do metal but for rock, blues, country, and other rootsy sounding stuff they do well