I am replacing a 20-year old Carefree single-handle shower control--there are no replacement cartridges; Universal Rundle is not supporting them. I found that the Delta protrudes farther from the wall than the others, which is a problem for me, but it seems to be a solid control. I actually purchased several units at HD and Lowes to compare them. The American Standard (AS) seems to make the most secure device, but AS is divesting itself of the retail plumbing and I fear that the AS may go the way of Carefree! The Moen is very small and compact, and has the shortest protrusion from the wall. I haven't seen the Grohe or the Peerless. Are there any honest comparisons with pros and cons? It's tough to change it after it's installed!