That Ca't sound bad, I am thinking. It works well with Vox and Vox-style amps. Not really transforming it into a Marshall, but you get some of that flavor.
I have the gold single version. One of the better Plexi-in-a-boxes I have. It's one of the few that has that split-sound where there is like a distortion on top of a clean ringing sound and the distortion is slightly compressed and then fades out to a clean ring like the real amp does. It's slightly brighter than my other MIAB pedals, but that would work well with a VOX.