I have purchased the 550 for school elevation activities. I am also a hunter and have similar nikon at home. The use of rangefinders is standard. Yards/meters two buttons on top etc... This 550 has an lcd screen to display your angles from the base to the top of an object which is great. It automatically determines the hight usung some trig functions and its super easy. The price is firm at 350.oo but you do get great optices and eye relief is much better than other models. If you are just ranging go for a cheep alternative. This is for those of you who like to know more scientific information such as angle to target. I love this little thing.
Pros: Great design, eye relief, waterproof, clear optics
Cons: still high priced but worth it for the features
This review was written in the old system and had content requirements that are different than reviews written today.