The enclosure and switch are good. (Excuse me for using someone else's photo)
It's all the little components on the board that I don't like. There's no way to repair those small parts if they break. You have to replace it.
The bypass sucks out some tone and I definitely don't like that. If there was room for a 3dpt switch I could change it myself. But there isn't.
I think it's the idea that MXR and GC would put a MSRP of $99.99 on this pedal when the components are similar to pedals that are in the $35.00 range. And the enclosure and switch aren't worth more than $10.00 at the most. If anything, this pedal is worth $50. IMHO.
Take the EHX East River Drive or the Soul Food. The ERD is true bypass, and the Soul Food has a switch that can be buffered or true bypass. Both are no more than $62.00. The ERD has regular componentry, while the SF has similar components to the MXR pedal. But it's still not $100.
As a $20 pedal, yes this is a good buy. Although it appears that we all bought the Classic Overdrive pedals, but prefer the Zakk Wylde Overdrive more. If it didn't have that switch, would we still be happy? I can honestly say I wouldn't be happy with it.