I live in San Antonio. I use the fly screen for most of my riding, leaving it on for 90% of the time. The fly screen is large enough to stop you from becoming a parachute at highway speeds and above and it looks good. On long trips, I wear a full face helmet with it to catch the bugs, sand, rocks, etc. Around town I wear a 3/4 helmet with a flip down screen, or an open 3/4 helmet with glasses
I also have the Roadster screen. I am not a fan of large wind screens in the looks department, but I do use it for long trips on occaision too, and I use it in the winter to keep the cold off. The Roadster screen does bring some of the radiator heat up, but I do not have the Triumph lowers, and I understand they do a great job of blocking this and reducing turbulence. I wear my open 3/4 helmet almost all the time with the Roadster screen.
Triumph screens are not quick disconnect like Harley, but there are only four bolts, and it only takes a minute or two to remove one and connect the other.