I put one on in August, and if I had to do it over, I would go with a bigger screen.
The Flyscreen does take more wind off my chest than I expected it to, but it directs it at the top of my helmet's faceshield, creating more noise than buffing. I still feel the wind on my shoulders and arms, of course.
I bought the Flyscreen for the looks, and did not expect a great deal of wind protection from it.
I fear the big Roadster screen would be a liability in cross winds, or when passing 18-wheelers on the Interstate, but I have no experience behind a big screen to really know for sure.
The Summer Screen looks more attractive to me than the Roadster, but that is due to the way my bike is set up.
If I were to buy another, I would buy this one:
SPORTECH CRUISE SERIES, but I have to admit - I don't know anyone else who has it, so I don't know how well it works.
While I was trying to make a decision last summer, reading all the threads I could find on this forum, I came to the conclusion that a screen purchase is a very personal buying decision, as we are all of different heights and weights, wear different helmet styles, and possess different riding styles - all of which make a difference as to what will work for you, and how well it will work.
You can spend a lot of money experimenting. Good luck.
As for the removable type - those that have them - do you really ever take them off? (Is that a reason to buy one? That it can be easily removed and put back on?) Just a thought.