Review (3/5): Does not heat "at a constant 75 F" - you still need an external thermostat!
I bought this heating belt because the description says "It heats at a constant 75 F (24 C)", but mine is consistently well above 100 F. Since I don't have an external temperature regulator I've been having to manually plug this thing in for 10-15 minutes, unplug it for half an hour, etc. to keep the beer in the fermenter within the mid 70s, otherwise the beer gets cooked. The belt works fine in all other respects, just be aware that you WILL need an external thermostat, just like all of the other belts on the market.