I'll through in my two cents after yesterday's round:
1. They are flat. It's almost as if there' no shoulder and the flight plate extends directly to the nose of the disc. Makes for a very good feel in the hand - almost deeper feeling than the higher-speed drivers.
2. They are beefy OS at ~340-370 (I throw Volts 360-400). The course I typically frequent has a lot of shots with four lane road to one side. I've never trusted a disc before for big hyzers out over the road, but the Resistor left me feeling impressively confident about the shot.
3. The Resistor laughs at wind. That's about it here.
4. Great skips. Rangeable like a mid but with much better skipping on level-to-slight-hyzer shots. They feel controllable, for what that's worth.
5. Speaking of control - they're controllable. I'm not a super-high-powered player, and every OS disc I've owned has, in reality, owned me. With the Resistor I feel totally in control of the line. I have the power to get it where I want it consistently. This is what impressed me the most.
6. They're shorter than the Shock/Volt/Amp. Definitely hits ground sooner for me. Should be obvious, but it surprised me based on the feel of the disc and the relative speed it felt like it was flying.
All in all, it's an OS driver that I like - and that's a first.