Solid heater for the price!
I decided to do a temperature test with this guy rather than crossing my fingers and entrusting it with some wort or must. My basement ambient temperature is 61F. I put 4 gallons of water in a bucket with a thermometer probe, put a lid on, wrapped the heater with a bungee, put the bucket on a carpet scrap square, and then wrapped the bucket-heater with a cheap fleece throw. Over the course of 3 hours, it brought the water temperature up to 80F (I don't think it would have gotten much hotter). Add in a temperature controller and this is a boon for chilly basements!
This thing is like a plastic sheet, imagine the cover of a soft binder. The connections are held in place with some kind of silicon/epoxy rather than a more sturdy connection. I guess I'll have to report back after this has seen more use as to the longevity.
Reviewed by: Jonathan Fry