Put one on a .90m primestar oval, seems to work just fine. Bolted right in, the front of it was right where the front of the orig feedhorn was. I didn't do any in-depth comparisons since I wasn't using the dish anyway, just had a bad lnb and I wanted a replacement. I would say it works as well as the original lnbf or maybe just a bit better on most satellites. Good cheap replacement lnbf.
edit to add : Right now I have that one pointed to AMC9, and the color bar channels are pegged at 99%quality, the RTN feeds are
showing 50signal/80quality. Sunny and cool for right now here.