The thermal setting is perfect, even in the setting of Eco shower Garniture, no variation in temperature and the noise level is reduced even more if you want to full pressure, as you can hear not even the water in the Armature.
The scalding does not exist, only in winter in cold temperatures when the cooling system of Grohe lapped the faucet, you get a shock when you touch the faucet in the bath accidentally, because one believes one has burnt herself, while she is cold only. :)
There is absolutely nothing to complain about.
When hot water in the faucet, you Factory used a sieve, when there is no outlet, ideally, no reduction or flow reduction in calcification.
The tub is now sooner than with the two old single-lever mixers ,.
As I said, highly recommended, no penalty !!!
MFG Robert