We've had them for over a year and they are holding up well. Those in the cockpit area are much, much nicer than the original pull-around drapes/curtains. Haven't driven with the day shades down, but cant't see any reason not too (except for the windshield obviously). For that matter, one could have the night shades deployed as well in the living portion of the coach. The windshield day shade can be partially lowered (to a predetermined limit) for a sun visor effect. While the cockpit side day shades could also be deployed, that may somewhat inhibit visibility of your mirrors if they are side mounted (e.g., viewed via side window vs windshield).
COL, USA, Retired