I've been using these Face Shadow Over Glasses Sunglasses for a few months now, and they've become my trusty companion for both day and night driving. The HD night vision lens really works - it's like someone turned down the brightness on annoying headlights while keeping everything else crystal clear.
What surprised me most was how lightweight they feel. I barely notice I'm wearing them over my prescription glasses, which is saying something because my regular glasses aren't exactly feather-light. The one-handed operation is genius when I need to quickly adjust them while driving.
The polarized lenses are fantastic for daytime use too. I recently took them on a beach trip, and they cut through the glare off the water better than my expensive prescription sunglasses. They fit securely over my rectangular frames without that annoying 'double bridge' pressure point some fit-over sunglasses have.
My only minor complaint? They do make me look slightly like a futuristic bug when worn with my regular glasses - but hey, safety first! After getting used to them, I actually kind of dig the oversized look now. For the price, these deliver way more value than I expected from fit-over sunglasses.