It seems the technology moves forward enough for me to buy a new one, about every 3-4 years. Right now, the 4k units are what you want, but are still a bit pricey. Once they drop in price, I will move up to one of them. Here are some of things I look for. 1. Permanent tape mount, not a suction cup. 2. One that fits behind the rear-view mirror, or there abouts. 3. Units that appears as part of the vehicle, best with a wire cover. This looks factory and prevents thief. 4. Newer models have the ability to view footage on your smart phone via an app. This is really helpful if you need to show a LEO an accident or incident immediately. Now I have to remove the chip, find the chip holder and insert that in a dongle than into my tablet. 5. Consider the wiring harness to the fuse box, rather than the plug lighter. Since I keep the screen off, I have to keep an eye on the unit to make sure it always powers up, cause the plug can dislodge. 6. Check the camera angle often, the camera can be angled up too high easily, like when you go to the car wash and they clean the window, they often hit the unit and the camera is pushed up or down, and not recording what is in front of you. 7. Consider a rear camera as well, I have two separate units, one in front, one in back