Very pleased with most Bachmann so far, especially at this price point. Almost no time at all to break it in, strong runner and quiet too. It does have a very short wheel base, so it hopped noticeably at the top of a figure 8 where the track reached maximum height, no way to make a totally smooth transition with sectional track. My longer engines went smoothly over, but the little guy has a hard time. Ended up putting him on my level s curves where he easily pulled 4 box cars and a caboose. Really goes through a double s curve beautifully.