This screen on the 2011 America is one of the best looking screens I've seen and the quick release helps with cleaning together with the release lock makes this practical and once removed, the small parts left on the bike do not look out of place riding without the screen.
Having said all that, today, the screen was put through the ultimate test for protection and this aspect is badly flawed. There has already been comments about the fact that this is not really a 'see through' screen. I'm only 5'7", but even I ride the bike mostly looking above the screen. Which is ironic really as 'shorties' have always complained that Triumph only make bikes for tall people.
Okay, my experience: After finally collecting my bike from the dealer, having had a problem sorted (post elsewhere) I had a 50mile journey home. There was quite a bit of wind, and several prolonged heavy showers. I was wearing a Caburgh helmet with a visor. (not a full face helmet). Not only did the rain penetrate the inside of the visor but also lifted it up! In all my years of bike riding, that has never happened to me! On dry days I use an open-face Shoei helmet with peak. With that helmet I get a good deal of head blasting.
My conclusion is that the Roadster screen is too short. The angle of it cannot be adjusted at all.
A lot of the cost is in the stainless steel frame with the Lexan Polycarbonate being the cheapest part. So now I'm considering making a new screen with a sheet of Lexan. This should cost no more than £27
Interestingly, the current Lexan screen is 4mm thick meaning that the Radius of the curve for cold-bending must be no more than 400mm which is exactly the curve of the existing screen. So no heat required. The current screen must be stress bent onto the frame with the bolts attached. The whole thing looks quite easy to do with sharp tools and a decent workshop, so my next project is.....

Alan