I don't know what you can write about a valve.  It looks interesting?  I had a hard time trying to find out what valve to buy.  I contacted Wayfair but they weren't sure.  They sent the question to the merchandiser who couldn't answer the question.  I finally called Moen direct and was told this was the correct valve for the trim kit and shower head.  There is a backlog for installations so I don't yet know if it REALLY was the right one.  It seems I will have to wait to find out.  I can modify my input here when I know for sure.  But, it seems when Wayfair does not sell the the faucet with the appropriate valve, they should know what precise valve goes with the product.  It took me two years to get an answer from someone and still not sure if it is correct. So my rating reflects my unsureness at this stage.  I am sure the product is excellent....with the right trimkit...whatever one that may be.