I use the Caldwell Ballistic precision which goes for about $100. Its been good for my needs. I have had issues with the sun shades blowing off if I put it too close to the muzzle of my muzzle loader but 10 yards away its fine. Have had occasional errors due to alignment but its pretty forgiving. Most of the issues with errors were due to either needing to use the shades or not.
I would get a blue tooth model next time. I hate the cord. Sometimes the cord plugs in and works other times I have to mess with it to get it to work. Then there is always tripping over it when adjusting the chrono. Hope that helps.