Grohe is a trend setting brand in plumbing fixtures, and their thermostatic valves are one of the best out there. The "set it and forget it" Grotherm valve is very well made and works like a charm, every time, keeping a steady water temperature while you shower. Make sure that the installation is done by a qualified plumber who is experienced with this product.

Got this as a replacement of an old grohe thermostat. Looks really robust. Hoping for it to go for longer. The old one did almost 10 years before it needed any work

best product by Grohe

Had it installed for 2 years now, and still scalds even when set to lowest temperature. The instructions are not available to correct the situation, and the online pdf's do not mention how to calibrate the temperature setting... Very frustrating