The first single lever mixers we had was also of Grohe but the cartridge still has O-rings as well as about 20 years, has held, then a producer of OBI held for 6 years, was the penultimate of ALDI ca.1,5 years held, the last one is now again the Focus E mixer tap of Hansgrohe. Installation was easy, the valve is firmly attached to the sink does not wobble has a good guide can be operated well and looks good. This single lever mixer can really recommend.
