I'm an active IPSC shooter here in the Philippines and into 3-gun matches.
I've used quite a number of red dots and in my personal opinion, the JPoint is the best. For it's size it has a bigger window and it is very light. The red dot (8moa) is so clear and round unlike many other brand. The red dot 'sits' the lowest too and the glass/plastic is very clear unlike the glass/plastic of other brands where it has a slight color/shade.