I am a former owner.
I used it in a trashmetal powertrio and a hardrock band.
Overall, I would say this is a good pedal, especially for the price.
I initially bought it as distortion pedal, but I got tired of the distortion mode pretty quickly. A bit to noisy and tonesucking in that mode IMO and IME.
I used it mostly used it in overdrive-mode... which with my Trace Elliot rig at high volume leaned toward the distortion side.
So it was somewhere between overdrive and distortion... in overdrive mode, overdrive and distortion can be a very thin line sometimes.
Many people here on the forum report that the VOID switch is utterly useless.
I personally don't think so. I always used it in VOID mode 1.
It's sort of an enhancer, it adds emphasis on the higher harmonics or something.
Most bassist think of an enhancer as a noise generator.
I actually liked it on the PD7, no unpleasant noise and it made the pedal shine for me.
The sound of the PD7 is on the metallic side, rather than a warm overdrive.
A bit more on the bright side while at the same time it is very good to keep the lowend present.
I gave my PD7 away to a fellow TBer, because I vowed never to use an overdrive or distortion pedal anymore.
But I am currently in the market for another overdrive pedal. (My needs and tastes changed again

)
And although I had positive experiences with the PD7 in the past, I'm not going to buy that pedal again.
I want something a bit more warmer... more tube-sim, not metallic cold and bright as the PD7.
I am looking myself for something in the Tubescreamer variety. Although with the PD7 being a product of Ibanez I expect it is based on a Tubescreamer.
Based on experiences I read I am going to give the Digitech Bad Monkey a shot.
So, the PD7 is good, but there are probably dozens overdrive pedals that are better. But at higher price points of course.
Many people can suggest pedals that would be better (although that is subjective) and probably cost more.
The Voodoo Labs Sparkle Drive is a Tubescreamer clone and gets a lot of praise for example.
I hope this was helpful.
I had one, liked it.... now I am looking for something else.
How I used it: overdrive, high gain and VOID mode 1, it did something special and awesome only the PD7 could. And it was awesome for my taste. YMMV