Best "Vox in a box" out there!
If there's a better "Vox in a box" pedal made, I've yet to find it. I've owned the Catalinbread CB30 and Joyo AC Tone. I've heard good things about the Tech21 Liverpool. But the Boss Combo Drive is absolutely phenomenal. It is NOT just an overdrive pedal. It operates a sparkly clean boost with the "Sound" knob counter-clockwise. Turn it up a bit and you get that classic AC30 breakup tone similar to The Edge. In the higher gain settings, it can do a pretty convincing "Top Boost" Brian May tone.
But my favorite settings are the Clean or only slightly overdriven settings. I've heard many people dismiss this pedal because it's made by BOSS and it's "just another Tubescreamer". Nothing could be further from the truth. It transforms the sound of your amp. It is truly a modeling pedal, but unlike other (more expensive modeling pedals), you can get the Vox tone you want with just a two-band EQ and the Sound knob. Highly recommended!