Here is my long 2 cents.
I bought a tremoverb combo twelve years ago, and then traded it for the head version 6 years ago. I don't plan on ever selling this amp. I plan on purchasing another for a backup/home amp. I have never had this amp let me down(either version) in twelve years of gigging. I do put new tubes in it once a year (I've went from liking my amp to loving once I started using E34L's eight years ago).
I love that this amp has been versatile enough tonewise as my musical tastes have evolved over the years. It does need to be played loud to sound great in my opinion. I can dial in great clean tones at low volumes, but the high gain sounds really need to be cranked to band volumes to sound right(not insanely loud, but louder than most people play in their home). The red channel is the modern dual rectifier gain sound, and it's why I originally bought the amp. That being said, I never use that sound in a band situation anymore, I'm usually going for a hard rock/vintage rock medium gain sound to my overdrive. I really prefer to clone the red channel to orange so I have two orange channels. I usually setup the tremo with the orange channel in vintage high gain as my lead tone, and the cloned orange channel in vintage high gain as my crunch rhythm channel then just back off the volume on this channel for a cleanish sound. In the interest of gaining three footswitchable channels, i've been running a boost in the fx loop lately so that I can have a full clean channel again. I also really like to run the clean mode with a bit of volume to get it a little dirty, it's just really sweet sounding with a single coil neck pickup.
The reverb is awesome on the orange channel of the tremo, but I've never really liked it on the red channel whether it's cloned or not. It just doesn't sound full/right to my ears. That's okay for me since I usually only want it on the orange channel.
I really prefer the head version of this amp. The combo was a back breaker weighing in around 100lbs, and I hated transporting it. The head is no lightweight, but it's much easier for me to carry and fit the head and seperate 2x12 in my car or up stairs. Band volumes would constantly rattle the combo, and add extra noise to the amp. Also it sounded a bit mushier then the head, and not in a good way, due to the open back v30's. I ran it for awhile into two extension cabs without the speakers in the combo itself which sounded great, but this was too much crap too haul around.
See obnoxious stack here:
I run my head currently with just the old vertical mesa 2x12 cab in the picture. It has an EV-12l on the sealed bottom and a mesa black shadow celestion on open top. I really like how full this cab sounds. The clarity and sound in my opinion is far better for any other cab I have a/b'ed it against with the T-verb.
The bottom line is that the tremoverb is a great amp, and has a variety of useable tones waiting to be coaxed out of it.