You know if they spell heaterz with a 'Z' it has to be good...
Very nice. On my SV I have the heaters that go under the grips, and I have them wired through a relay because I know I would forget to turn them off. Mine only have a high and low, and to be honest high is not that hot. They work great down in the 40s (F) but below that I still need to wear my mittens. I also have aluminum clip-ons, so they suck the heat away quickly. These grips look very nice!