I own the Shimano 600 version of this hub. Rode it yesterday; works great.
Heads up: this freehub WILL accept Hyperglide (and clone) cassettes from 8 to 10 speeds. Or 7 speeds with an extra spacer. No point in suffering with hesitant and clunky Uniglide shifting when you can get Hyperglide.
However, your freehub will NOT accept the 11-tooth cog found in most cassettes these days. Minimum: 12. And make sure you use the compatible 12+ tooth cassette lockring. The smaller lockring does not provide enough retention on the cassettes that start with 12, 13 etc teeth.
Note that 11-tooth cassette cogs are practically useless. If I am going 40mph: I'll coast.