i've got the barska and like it. i haven't used others (except my brothers eotech for his AR), so i don't have much to compare it to. it holds it zero well. i recently was shooting and had a bunch of kids who had never shot before and they were all hitting a small 22 steel target from about 40-50 yards away without any trouble. the rectical is like a plus sign - but with a dot in the middle. it feels well built. i was thinking about getting something with magnification, but for a red-dot it works well.
here is some more discussion about it:
Bushnell Trophy 1x32 MP vs Barska 1x30 IR