I'd say that over the past few years I've been pretty pleased with all the purchases from VO that I've mounted on my '72 Gitane TdF. I've only had one item shipped that was wrong (Rear Constructeur rack), and that turned out to be an item for the same price I was going to order anyway. While VO offered to correct the order, I just decided to hang onto the rear rack and order the front rack later.

Here's the list I've used on my TdF so far:

Honjo 35mm hammered fenders (gorgeous, but best thought of as a project not a direct-fit product)
Japanese bell on a retro mount (one of my favorite additions)
Randonneur rack, undrilled (see fenders above -- this took some ingenuity to get the proper line, but the effort was well worth it)
Constructeur rear rack (no fitment issues, and looks great)
Constructeur rollers (my absolute favorite item so far)
Grand Cru French thread BB (I ordered the wrong size to mate with a Campy ISO triple crankset at first, but got it right on the second try)
VO rack to light bracket (looks flimsy at first, but is surprisingly stiff)
Stem mount decaleur (another assembly required product -- the design works fine, with nice finish, but my TdF's troll-like geometry required me to shorten the length of the arms to get the bag back some)
VO Campagne front bag (Probably the one feature that gets the most attention on the current build -- I later did some customization on the bag to stiffen up the bottom, mostly for cosmetic reasons)

I've currently got a VO Croissant bag on order -- to haul around my basic toolkit, and for times when the Campagne bag is overkill. I'm really looking forward to seeing it in person.

In all, I'd say I'm a happy VO customer, and they'll continue to get my business in the future. I've got a Maury 650b randonneuse copy I'm itching to build soon, so next orders on my list will be hubs, rims, cranks, racks, & fenders for the project.