I remain convinced that GROHE products are of good quality, but it is not. Indeed, after a week of using the left handle for selecting the knob or shower and turn the water remained in my hands. Inside the large screw is severed. I wanted to return the part to Amazon for replacement but to the extent that I have installed the column three months after the order, the return policy does not apply (maximum two months). Here I am good with a shower column at this price, with an open part and a grip on when I have to select the output or shut off the water ...