The company is Israel Arms, International (not "Israeli"), of Houston, Texas. Their M1 carbines are very nice, and of high quality and reliability.
The main reason you'll see a negative review (most are very positive) is because they aren't actual GI-surplus, and many of these folks have had poor experiences with PRIOR examples of commercial Carbine clones such as the Iver Johnson, Plainsfield, and especially the Universals. But the new IAI carbines are much better than any of these.
Plus, most of the surplus Carbines on the market are nearing (or have exceeded) end-of-life. The military was experiencing lots of receiver failures in the early '80s when they finally got rid of them, due to decades of use. Certainly, not all Carbines were shot quite as much, but it is just about impossible to tell anymore. At least with the IAIs, you're getting a NEW receiver with a LOT of life.
Just some perspective...
-Troy