Just got them in the mail(symtec with rocker switch) and installed them on the bike, wasn't to bad of an install(I are electrically inclined), and having a aircompressor making grip removal easy. took about an hour and an half. I quick checked them and they heated up quickly, within a minute. the true test will be tommorow on the ride in to work, it's supposed to be 31 degrees. will update tommorow, also with pics of what you can see also-not much after installed.