Uneasy on this product - SIG SAUER Kilo2000 7x25mm Laser Range Finding Monocular

I purchased this product and when I received it everything seemed to be ok with the packaging.. but after opening the box and removing the rangefinder I found that the unit would not range at all. it would go through all the functions and screen options just fine but it would not range. I contacted sig and was told it would be 8 to 12 weeks for repair. I then contacted Optics Planet and I was able to return my original rang finder FREE of charge and I received a replacement unit 14 days after sending in the broken one.. Since then I have used the rang finder several times and it seems to work ok. I can only range furred targets and trees out to 1100 and I have had no problem ranging reflective targets out past 2000. I have had a few moments when the unit seems to not power up, by simply removing the battery cover and reinstalling it the unit will work again.. possibly some dielectric grease and things mite be more consistent.. all in all im a little gun shy about the unit working consistently but time will tell I guess.