Jim,
I've got a set of the XV belts in my car now. They work great! The XV belts have a fixed drop to put the shoulder belt in the right place. I bought my set off of eBay after hearing about some delays with XV, but I didn't have any issues with them. They're super easy to install, and cost about the same as others I looked at. They're as comfortable as any modern belt, and a lot easier to deal with than the original fixed version.
My only real complaint is cosmetic, since the belts hang down from the upper mount point all the time. Not as photogenic when you roll down the rear windows. But that would be true of any modern belt.