Common "guitar books" I own do not metion it (Pittman, Weber, O`Connor, Dave Funk), but there`s a chapter "Transistor Dinosaurs" in the "Amps!" book by Ritchie Flieger. Some citations, page 72:"...Because transistors were new and unknown, there was lots of trial and error in early circuit designs.
...Fender`s first shot at solid-state amps was a disaster the likes of which would have killed a lesser company. Fender`s new CBS ownership twice released a complete series of SS amps; some shared the same names as their tube brothers.
...These amps were so poorly made and sounded so bad, they were gone before most players had a chance to say yecch!
...Solid state Twin reverb - I really don`t know what to say about this amp. I still can`t believe someone would do this...(picture)"
But, don`t worry - if you play some kind of "alternative" rock, this amp is "cool" looking and probably sounds weird enough!