Absolute thumbs up, as far as project-studio gear goes. We bought one brand-new in 1990 for $3000, (a good deal at the time) and used it hard for three years, until we got some ADATS. (Because I just hated bouncing drum tracks down to stereo, I just had to have more tracks.) Since then the Tascam has mostly sat in the closet, except when the ADATS broke down. (Have spent over $1000 on ADAT repairs; the Tascam has never been worked on except for normal alignment.)
It does have a couple of weak points though, mostly related to its project-studio heritage.
The plastic NAB hub locks are $*^t. I've broken 3 or 4 just puting reels on the machine. Don't push them too hard.
Not very good at punching in. (Or is that just me?) The Tascam needs a beat of actual silence on the tape in order to get in and out clean. With the ADATS I can get in and out on the decay of any note.
It was designed for Ampex 456 and won't be happy if you try to set it up hotter than 250 nWb/m. I don't consider this a disadvantage, as I like the sound, and smell, of that tape. And you can nail the levels really hard and it still sounds good. (See Eddie's "Tech Files" in Mix for his recent series on "Narrow Format Analog.")
Got the Tascam out this weekend when my ATR 102 broke down (Damn. Any good techs in Seattle?) And all we wanted to record was some backwards drum tracks...
Anyway, the TSR-8 is a great machine for a project studio, but I really want an Ampex MM-1200 16 track. Looking for that T-Rex tone...well, that was probably a Studer A-80...whatever...
SC