I have a Diaz Tremodillo; There is no need for anything else. Still, it just baffles me. There are a crap ton of these things available, and expensive! At least for the complete lack of awesome that they are....
I think TR-2s are cheap for what you get. $50 for a tremolo that will last forever and give you pretty much any sound you'll need. Since it has a wave shape control, you're not locked into a particular type of tremolo sound. It will do woozy swells AND it will do helicopter chop. It has a good buffer (which I'll take over true bypass any day) and its footswitch won't require replacing every year or so of its life.
It's Boss, they're known for decent sound and extra decent reliability. I can't name one other big manufacturer of pedals that builds their stuff as bullet proof and I've got a small graveyard of tiny boxes and rack units to prove it. I've only lost two Boss pedals over the years and both went at the same time a One Spot died. I still think the One Spot killed them and I haven't used one since. I just don't trust it.
I've replaced flaky flip/flop switches on six boss pedals in my lifetime. They're well engineered pedals, but not every part will last you forever with regular use.
play your cards right and it gives you no volume over 75% of the time. Personally, my tone is just too damn good to be digestible in any larger amounts.
$50 for a good used BOSS pedal is a bargain. I remember having to buy them new for $100+ because the only ones you could find used were trashed, and the guy selling them wanted $10 less than new so he could buy a new pedal with minimal OOPE!