On the other hand, the medium nib in my Bourgogne demonstrator was exceptional out of the box. I might say that it writes even better than the medium nib on the Nakaya I once owned. (That's not a coincidence--Nakaya uses Platinum nibs.) I have not experienced a single skip or hard start with this pen. Platinum uses a patented "slip-and-seal" internal cap that keeps the pen from drying out for up to a year of non-use. I don't plan on testing this feature anytime soon, but it's nice to know about, I guess.
Value Proposition
This is where things get tricky. Platinum pens apparently are much cheaper in Japan than they are here in the U.S. For example, the Chartres blue demonstrator retails for approximately $228 at U.S.-based retailers, while those based in Japan (or who import directly from Japan) sell this pen at a much lower price point. While I typically try to support U.S-based retailers where I can, it's too much to expect customers to pay $150 extra on the basis of loyalty alone. I would note, however, that if you purchase from Amazon or eBay, you might get stuck addressing nib issues, etc. on your own, or experience long wait times returning the pen. For this good of a deal I'm willing to take that risk, but others may not want to deal with it.
Takeaways
At $75, the Platinum 3776 is an excellent value proposition and moves itself into competition for the "best first gold-nibbed pen" list (subject to the potential-lack-of-actual-customer-support qualification I mentioned). For a little more than a TWSBI Vac Mini or a 580 AL, you get a 14K nib that's pretty much the same as you would find on a Nakaya. I am withholding judgment on the UEF nib for the time being, until I get the issues sorted out, but I can strongly recommend the stock (F,M,B) Platinum nibs. The medium I have is one of the best mediums I've ever written with.
If You're Interested in Further Reading...
Check out Azizah's review of the Bourgogne demonstrator at GourmetPens, as well as Junee from Alt. Haven's review of the Chartres pen.