Regarding not ranging dark objects, call Leupold. I had the same problem with mine (RXIII) and eventually it stopped ranging them altogether. They replaced the whole thing and it works great!I have an RX-II and it's a great rangefinder for the most part. Unlike some, I actually like all the settings. The TBR, although not really necessary, can come in handy if you're hunting in a steep bottom. The only real problem I've encountered is that sometimes it doesn't like to give an immediate reading on dark objects. In other words, you may have to range certain objects multiple times before you get the reading. That can be a pain, but fortunately it's never been a problem for me. There are a lot of good rangefinders out there, and I think the RX-II is one of them.