I'm a bit more particular about what I support, but I've done 4 games with Shovel Knight being the first to release, the other one coming up is A Hat In Time which is maybe under a year out from release. I also have Bloodstained and Yooka-Laylee backed. That's basically one out, one going to be released, and two others likely to be released. You do have to be mindful of projects, double check who is doing them, how much do they have done to show off already, things like that, as projects have been known to fail pretty hard. Even projects by big names can struggle as we've seen with Mighty No. 9.
And yes, when you back something, don't expect to play it anytime soon. Years of waiting and one must be prepared to lose that money.