I don't have much experience with these devices and I get very confused when researching rangefinders. It seems TIDWE has everything I need. I use it for archery and pistol shooting. The lens is clean and sharp. It seems dead on accuracy, but I've only tested it at 25 yards and clean. It's very easy to use. The only real flaw with TIDEWE and any other hand tool is that the results are only as good as they are consistent. If you're looking for 1000-yard perfection, this isn't for you. TIDEWE is relatively inexpensive, I paid $80, is lightweight, small enough for a pocket, and easy to use. I spent too much time learning expensive features I knew I would never use.