I just installed one for my LR4 a few weeks ago. I am going to post on the LR4 forum just how impressed I am with it and with the customer service. The LR4 rack I got is the same as the LR3 one. I went with the expedition rack. It is solidly made, easy install, strongly connected to frame, and overall seems great. I haven't really loaded it up yet but will in late Sept. I plan on adding a roof tent on it. Their customer service is great. The LR4 required a different front bracket than the LR3 and they didn't realize this (maybe I was their first LR4 customer). I told them about the issue and they were very responsive and sent me new brackets for replacement. All in all I'm very happy with the purchase. A great product and great service.
Hope my experience helps,
Nathan