This can build into a very good model, but, as others have said, it is unnecessarily over-complicated. I agree the sides, or at least the doors, could have been done in one piece - the separate etched hinges for the doors offer no real improvement over a single plastic moulding.
For all of that, Ratio omitted to include the grilles for behind the windows. I used some from Blacksmith Models, but Roxey Mouldings also offer similar items.
That's not to say it's not worth building: quite the contrary. This kit will be a very rewarding experience once you have finished it.
This photo was taken after I had repainted mine, so it lacks any transfers here. It was previously heavily weathered in Southern olive green, so the windows remain weathered, but you can just make out the grilles behind them.
Ratio Kit Bogie B by Jeffrey Lynn, on Flickr