I have had this helmet now for two weeks, riding my R1200GS Adventure.
Behind the Adventure fairing the helmet is almost as quiet as my Shoei Hornet. The beak is a little longer, thus providing better sun protection, although it is also a little narrower.
The internal sun visor works well and is one of my favorite features for everyday use. The large clear visor is fine, too. I like that it is infinitely adjustable. The shape of the visor allows opening it without a tab.
The interior is not quite as nice as the Hornet, but still comfortable. In terms of size, I wear an L in both Hornet and Bilt and the fit is excellent.
The Hornet has more vents and should vent better when it is hot. I was not able to test the Bilt in hot weather.