For longevity I have no experience, but it is all meticulously crafted and especially the flexible connecting cables are long enough.
The only difference from the built-in fittings from me is another box and the Excenterarmatur brass. The stopper is also made of plastic.
The manual is sufficient held in several languages and important to me with part numbers. Can break only the cartridge, the control module, which is available everywhere under the Grohe part number 46580.
I can only recommend this faucet to buy and not the hardware store goods at half the price. Here, too often dissolves the chromium layer and the faucet is leaking, there is no spare parts.
