For many years I've used a Zvex Box of Rock for low/med gain and boost with a Mooer UK gold in front for my hi gain/lead tones. My current set up is all DI and this set up wasn't working so well. I tried the Carl Martin Lick box which was as bad and difficult to dial in usable tones as other Carl Martin's I've tried so I got the Rodenberg instead. This basically puts my 2 pedals into one and the sounds are just what I wanted. The low gain goes all the way from clean to a decent mid gain crunch, a nod towards a Tubecreamer but with less of a mid hump which I really don't like about TS's.
The high gain picks up where the low gain leaves off and is a decent usable hi-gain for both rythmn and lead tone and again not to 'mid' heavy.
Individually both channels sound great and stacking both channels is also good and usable without sounding over the top.
The boost does what you need and the additional tone control is very welcome.
It's easy to dial in good usable tones with any guitar, Strat, Tele, SG, P90 and Gretsch 6120 all play nicely with this pedal.
I never thought I'd sell my Zvex - but the Rodenberg SL-OD is a keeper for sure.