Don't feel bad, I've inquired about Hi-Temp products before and have gotten little to no response whatsoever. I'm pretty sure that they are a reputable company and I've always heard good things about them, however I haven't had any personal experience with them.
I have never used them before, but from hearing some of the people talk on here, they are well liked. You may want to do a DC search on TOL or Hi-Temp to see some of the past threads. I h ave never heard anything bad about them. Maybe someone who knows a little about them will comment on it.
Just got their Prep Wash, Medium Cut, and Extreme APC. Man you get alot, cheap, and I know their work great. Ask Anthony Orosco. Man I can't wait to try out my Pizzazz