I find they are a big improvement, wipe cleanly and are quieter as they do not flap from side to side. One of mine lifts very slightly at speed but i think it is only due to the spring integral in the arm that presses the blade against the screen having weakened slightly. It is much better than OE.
washing/jet action appears less impressive than OE but actually it works perfectly.
Another point to note - apparently these produce less aerodynamic drag and therefore put less load on the motor/mechanism so should reduce wear and increase life. Useful as our cars get older.