Temper is a fantastic phase distortion plugin from Creative Intent. At first glance, it may seem pretty limited due to having only a small amount of controls, but with the filter section and the saturation and curve knobs, one can get a lot of great sounds out of this thing. Whether beefing up a bassline or adding some spice to a drum track, Temper is a good tool for the job. I especially love what it can do for basses and hi-hats. The filter itself is excellent, with the ability to get some nice squelchy distortions; just watch your speakers.
The GUI may be too dark for some, but personally I love it. I mainly use FL Studio so I'm used to and prefer dark color schemes. The fiery display is a nice touch, and the controls themselves are solid and fluid.
As far as customer service, Nick is personable and active here on KVR. I sent him a private message and he replied later that day.
Temper is available in VST, VST3, and AU, and at $10 is an absolute steal. Temper gets a solid 9/10 from me.