I have a arc 1000, ranges deer/elk out to about 450-550 yards depending on conditions. I have had repeatable returns off of shiny rocks at 950 yards, but rocks at 700ish are most common. I tried a Hi-vis traffic vest and got out to 980 with the reflector. I have ranged tree's at 600 yards. My arc (angle finder and horizontal distance calc) sticks and doesn't work all the time. Also the hold overs/drop functions are ok, but don't really match up with my hunting rifles well. My hunting partner uses a nikon, and our distances are usually within 1 yard out to 300. His won't give repeatable numbers past 300.
For the money it works pretty well, but it's no Swaro