The negative reviews are mainly related to a potential water hammer issue. I had this issue myself but found out it is easily fixed. The seller can send you two check valves that are easily inserted if you pop out the cartridge. I also found out the newer valves have these included. I bought mine in January and just installed it so it did not have the check valves. I was so glad to see someone post this fix in the reviews. Saved me a lot of time and money. While this was a major oversight, I really like the look and performance of this product. UPDATE / After using for a couple of weeks I can say the water hammer issue is still gone so it confirmed that the fix I mentioned above works
Water hammer issue / FIXED! Updated April 19,2021
The negative reviews are mainly related to a potential water hammer issue. I had this issue myself but found out it is easily fixed. The seller can send you two check valves that are easily inserted if you pop out the cartridge. I also found out the newer valves have these included. I bought mine in January and just installed it so it did not have the check valves. I was so glad to see someone post this fix in the reviews. Saved me a lot of time and money. While this was a major oversight, I really like the look and performance of this product. UPDATE / After using for a couple of weeks I can say the water hammer issue is still gone so it confirmed that the fix I mentioned above works