Review on ACECAR Universal Dual System 3.5 Inches HUD - Head Up Display for Car with OBD2 GPS Interface, Speedometer, Engine RPM, OverSpeed Warning, Mileage Measurement, Water Temperature - Suitable for All Vehicles by Joshua Coulter

Reason for 5 stars: Price $30 Car: Hyundai Sonata Limited 2016 Pros: - Easy installation (new car) - Good visibility (night/cloudy day) - Comprehensive installation kit - Good quality standard view (bars based on speed/rpm), no fiddling with settings - Easily adjustable angle for best view with magnetic ball head (included) Cons: - Poor view on sunny days with polarized sunglasses - Instructions are included useless - ghost/ double vision without installing a reflective sheet (included) After buying a new Santa Fe with a built in HUD I decided to try one on my Sonata. Obviously this is a lot simpler than the built-in option, but good enough for $30. This gives you what you need (speed + RPM based bar). With the 2016 Sonata, installation was easy in less than 5 minutes without reading a useless (small print and illogical) manual. I chose the included magnetic ball stand as it allows me to adjust the viewing angle and also remove it when parking in an unsafe area (I don't want someone breaking my window because they don't know what a cheap HUD it is is ) . On the Sonata I was able to reattach (tightly) the diagnostic port cover to keep it looking nice. I also attached the cable to the side of the door (not visible unless you open the door wide) so it looks pretty good overall. Visibility is great on overcast days and nights, but there's secondary ghosting as most new windshields are double. Blackboard. Even on sunny days if you wear polarized glasses it's very hard to see (still visible). The included reflective sheeting could have solved the problem, but I didn't want a clear transparent dead spot on my windshield. Overall very happy with the purchase.