We stayed here in May of 2008 and loved it. Ku is the only hotel of any real size on Shoal Bay East, which most folks in Anguilla told us was the best beach on the island--we visited a lot of beaches while we were there, and I have to say I agreed. So, for easy access to an unspoiled, uncrowded beach, Ku is a great deal.
Our room was huge, with a full kitchen, and very comfy, if not super-fancy. The French place next door has a killer tuna club sandwich, and the beach bar downstairs is friendly and relaxed. (We were there during a slow season, so I can't speak to whether the place really gets loud, as the reviewer says. We found it pretty quiet in general.)
It's not a massive luxurious resort, but it's comfortable and homey and well kept up--and again, it's on what might just be the nicest beach I've ever seen.