Just an update to this.
I've ridden in the rain hundreds of times and some of those were very heavy rain. With a normal shield, either dark or clear, the water would bead off mostly and anything left I could stick my head into the wind stream and have it move the rest out of the way.
I noticed on a daytime rainy day how the Bell Transitions shield did not bead as well and acted a lot like a car windshield where there was a lot of distortion.
Recently, on a long trip, we got caught in a big storm cell in Michigan and it was close to midnight... well, I could not see anything at all.. I have to lift my shield and try to look ahead with just my glasses protecting my eyes but the rain was stinging me and I had to pull over. One of the other riders switched helmets with me as his bike shield had more of a flip and he could peek under the helmet shield without getting hit as much as I was... we were able to get out of that storm cell and switch helmets.
I love that this shield allows you to ride morning-to-daylight-to-afternoon-to night and never have to stop and switch shields but..... I ride in the rain almost every time I'm on a trip and I feel in rainy weather - especially during nighttime, this shield is almost dangerous... again, I've never had this issue with any other helmet or shied. I'll keep it for the short rides when I know weather won't be an issue but I'll have a dark and clear shield in the trunk just in case.