Especially the neck pickup, with the tone turned low, growls merrily, tones sustains for days when soloing, and just give me the goose bumps. I could play one tone and enjoy the complexity and crunch of it for days. And this is both with master volume rolled down a bit and with a weber mass. I have the amp driving a 2x12" Framus cab in our bedroom in an apartment building, so I have to keep it low. Really hard when getting these kinds of tone, though.
Just wanted to get this out somewhere, P90s + Trainwreck = totally awesome, if somebody ever doubted that.
Unfortunately, I'm such a crappy player (I don't "deserve" the equipment I got at all), but I will try to make some clips at some stage.