Like someone else said...the only problem with a reversing loop is that you really have to have two of them. Once a train goes through the reversing loop and is going the other way it then has no way to turn around and go back in it's original direction. I had reversing loops in the track plan I'm working on and opted to take them out. For one thing I will almost always be running multi unit consists....tail to tail....so I can easily pull the train into a siding and run the engines around to the other end if I want to change directions. But, I'm also not afraid to run an engine backwards pulling a train if I don't have an MU consist...which I've seen many times on railroads. If you can't fit two reversing loops in, I'd recommend taking them out completely to give you more room for scenery.