One shouldn't knock a product simply because it's from CAI. They do a few things right. Sadly the Golani sporter isn't one of those things. I had one, and there's really not that much positive that I can say about it.
It looks cool, the free-floating gas tube is a nice design element, it seems capable of being accurate (but the rear sight on mine didn't seem to hold zero).
There's some features that are supposed to be good, but in practice aren't necessarily so great. The up-turned charging handle for example, while in theory is a good idea can lead you to bust up your hand on the rear sight assembly, it also gets in the way of attaching optics, if you're into that. The thumb safety digs into your hand if you shoot left handed, and seems too stiff to actually use if you shoot right-handed.
Then there's the bad things. The workmanship on the milled receiver is pretty crappy, badly finished. The gun is really overweight, I've had a AR in .223/5.56 and currently have an AK in .223/5.56 as well, both are significantly lighter and both still have negligible recoil so there's simply no reason for a weapon of that class and caliber to be so heavy. The gun also seemed to be picky about mags (which by the way are a good deal harder to find and more expensive than AR or AK magazines). The rear sight didn't seem to hold zero, no matter what position it was in, it would shift ever so slightly with each shot, enough to throw you off.
These guns are probably around $550, if I were looking for a gun and had only that amount to spend, I'd definitely look at something else.