I used one this year and really like it. Not sure about the previous posters experience, but mine worked flawlessly. The unit is solidly built and easy to use, once it is set up. I still need the manual to set it up, but once it is set up, just point and shoot. The size is great and I would certainly buy it again.
The only thing that I can say I don't like is the magnetic flap on the case. When removing the rangefinder from the case make sure that you close the lid softly. The magnets are strong and make an audible click. I know this from experience!