I haven't dealt with him yet, but he's who most everyone uses for Shins for their Vader. Those are about the most accurate part that he sells for Vader. A ton of guys over at the SLD use him for basic approval, but if you're looking for movie accurate parts, the only thing that really works from him is his Vader shin guards. His Vader chest armor is pretty decent too. A little more boxy than the real thing, but it's very close to being accurate.
Preferably, if you're going to him for Vader parts, find other people for everything except his shin guards.....
EDIT: Also forgot to say, he has a really sick looking neck brace piece for Vader, and I want to see if there is any possibility that I could only get the entire Vader piece that goes around the neck (so instead of a full helmet, only the bottom half.
That would be pretty awesome... this is eventually of course after my Vader is finished.