Go for it. I had a Sammie as a first loco and would not hesitate to buy another. It was a stellar performer and puller, but at the time, it did not fit the grand scheme and was sold to fund other loco purchases. I have subsequently purchased a second hand Millie which has essentially the same running gear. It performs very well and with the pot boiler and a large gas tank, it will easily steam for 45 minutes with a few small shots of water along the way. I have said before and will say again, Roundhouse makes the most mechanically sound and robust live steamers on the market today. They run like a watch and hold their value quite well.