My friends and I, and a shop where I worked have used and installed a lot of LuK clutches, and never had any problems or complaints. They are very high quality at a very reasonable price. It seems that they are getting hard to find, though. When I found this source, I jumped on it, and I suggest you do the same!
The clutch assy. it's self is fine. However in the picture it shows that it comes with a throw-out bearing (blue item) and that's why I bought it. I had to go to town and purchase one so that I could finish the job. Also this is a larger diameter clutch and uses 3/8" bolts rather than the 5/16" that the truck came with, so I had to go find them.