Got my hands on one of these the other day and I must say I am impressed.
Usually when I get a new ready to run wagon, first thing I do is change the bogies over to that from AR Kits or SEM's. The bogies that SDS are producing are excellent and match in with my kit bogies really well. I find that many of the RTR bogies are two thick and the wheel journals stick out to far. This to me stands out among a rack of wagons esp. when you look down on them at 45 degrees. As I am in the process of changing everything over to P88 wheels, the wheels on this are not an issue.
They come with KD58's as well so I don't need to change them out either. Pretty much all there is to do is weather.