I've been around on this board for about 5 years now and I have never heard someone say that they have a newer improved version. The most common issue is with the range. I've never heard of this being fixed other than the antenna mod. By the same token, it doesn't seem that the unit has gotten any worse either so if you've had on and now you need to replace it, I would go ahead. They're a pretty good value imho if you can get a good signal.