I dislike integrated. Thats the single complaint I have about my homegrown, is that it takes some weird "ICBM" cane creek thing, integrated. THe bearings press right into the frame, I really dont like this concept. So if the races are not properly machined, your screwed. Its easier to destroy the frame. I miss threadless headsets, the cups are the parts that will be destroyed if anything. Replacing a cup is cheaper than a frame.
The only somewhat integrated system I like is Zero stack, which uses cups but still places the bearings and all inside of the frame.