[Belenar]

I guess it will also depend on how this whole thing works. If it is using the onboard sensors, I think nobody here would be overly interested, since we know through experience that these can be pretty far off...
But if it would be a complete 'hardware' solution with a seperate temp. probe, I think people building water chillers, TEC systems, ... would be interested if the price is right.
I'm thinking of people building test benches as well. They could use this controller to build a TEC based water chiller to keep their water temps stable.