Yes, the viper can turn. I only fly xc and take a lot of photos with it which means that it isn't the best choice for the job. So I got a speedster 2 since I wanted something easier, my body was tired at the time and wanted something more convenient, and why would I need a viper. After flying the speedster 2 for a little more than a year, I sold it and got back on the viper, and noticed how much had missed flying with it. It became fun to fly again. I really like the way it flies.. except how it handles in turbulence. Flying hands off for photos in turbulence is not comfortable.
I noticed that I only want to fly when the weather is good anyway, so usually it doesn't matter. The turbulence I get when flying with the viper is always mild. Flying in worse turbulence was useless in my opinion even on a stable A. But sometimes it would have been good to have a backup glider that is more gentle it I start far from my normal take off.