The Plugall 1.5 inch to 2 inch universal mechanical test and seal plug works very well. I like that it is designed to fit both sizes of pipe and cleanouts. It is lightweight, but the plastic body and nut looks strong and the plastic bolt has nice deep threads and is strong, as well. I tried it in a 11/2" PVC fitting and it sealed very tightly and made a good seal. I'd definitely recommend it as equal to or superior to other cleanouts I've used.
Pros: Easy to Install, Good Instructions, No Leaks, Reliable, universal plug and seal for 1.5 and 2 inch., great for cleanout plug repair, easy to turn, durable plastic