Just replaced my Coleman 15000k(which I found out it didn't need replacing after all, just needed cleaning). Went with a Coleman Mach 8. Looks like a well made unit. Slightly more quiet than other unit. I researched all RV AC units, and found mixed opinions. Info I read on Coleman Polar Mach(now the Mach 8) was what swayed me toward the Coleman, and the fact that it plugged right up to existing wiring and venting. I found good prices on ACs at pplmotorhomes.com. Even after shipping(4 days)it was still cheaper than my local RV store.