I have an AFX FX-3whatever, and a Vega street helmet with an internal sunshield. My concern with the sunshields is that most do not seem to be rated for UV protection. The problem with this is that they block visible light, causing your pupils to expand, potentially letting more invisible UV light in to damage your eyes. The AFX main shields block UV light, even though their helmets have no internal sunshield. I do really like the sunshield feature on my street helmet that has no peak though, and I would hope that mfrs start using clearly-labeled UV-blocking materials for these.
You wouldn't wear sunglasses without a UV rating, would you?
The flip-down feature on the Bilt seemed nicer than the one on my Vega, BTW. The padding and appearance of the Bilt seems good too. I'm also happy to see that Bilt decided to offer a helmet in white.