I have used Grohe on a number of projects and it is fairly reliable once you get it in (faucets stop up with debris too easily) but my biggest complaint is they seem to be missing parts new out of the box more than any other manufacturer that I have seen. That kills a contractor who needs to get the work done. Most of my projects are commercial so I tend to use more Chicago/Sloan/Symmons but I (my company) has installed thousands upon thousands of Moen and their design and quality and dependability have made them one of the premier competitive priced ftgs. on the planet. I have Moen 4570CP lavatory faucets and a Delta 174 kitchen sink ftg. in my own home. That's what I think of them.
Bob Wheatley