Grohe guarantees quality. When the first delivery, although missing a part, but the faucet was replaced entirely within 4 days from Amazon. Therefore I can only recommend all Amazon. The fitting is easy to install and even to a layman by the very good installation instructions no problem for a self-assembly. I liked the whole package, the fitting and the floor-mounted boilers assembled an expert. Previously I had a fitting of a furniture store that has indeed now ideally performs its service 10 years but the handling and ease of mixer is a lot better. Personally, I'm glad that I bought a Grohe faucet, since you lt anytime. Statement of the installer gets all spare parts.