I was looking at a copper chiller but the staff at OBK said this one would be durable and work well. They were not kidding. First off this thing got my beer from 215f to 80f in about 20 minutes but I was out in the sun on a 30 degree day. I don't think my hose water was ice cold. The last 10 degrees took a bit but nothing compared to my hour or longer ice baths. I should have gone with the 50 as it doesn't displace as much as I was expecting it to. Even in a 5 gallon batch I could EASILY use a 50. 1/2 inch seems like it would be a worthwhile upgrade also. I suppose when I order a bigger brewpot I can upgrade the rest of my system haha.