How well does this stuff work?  Would you recommend it?

I used water wetter when I was having heating probs.  I finally put the factory thermostat in and a 4 core radiator and now the probs are gone, at least until summer.

I've never tried it but it seems to be another product like Water Wetter but much more expensive from what I've seen. Water Wetter has a good reputation.

My understanding is that it's more efficient mixed in with straight water but will mix fine with a glycol blend.

thanks