I have one. I have for about 15 years. One of my Dorm Mates in College also had one back in late 70's early 80's.
I have a lot of "Natural Sound" Yamaha gear. My first was a CA-810 that I still have.
They are, IMO, very solid, well built, respectable rigs.
This rig has plenty of power, does not "color" the audio excessively without your injection of tone controls, and delivers very "natural" sound.
It has ample heat sink and ventilation, the circuits are well tuned and stable. And even the cabinet is made well with decent veneer. I have replaced the dial lights on mine. That's it. No cap replacement yet.
I'd be very interested if I did not already have one.
Good luck! Let us know what you decide and if you acquire it.