Title: Does fine with straightaways, but derails easily on curves.
Review: I bought this in part because other reviews lauded the six wheels and their superior ability to stay on track. It's nonsense: the middle wheels float, so they don't help at all, and the wheels hug the outside of the tracks, so minor misalignments (which are very hard to avoid) send Salty off the tracks. I had such high hopes. Sigh.
Is this product review negative?