This is a great Kato locomotive, I bought this as Christmas present for myself. This locomotive came running smooth right out of the box, no need to really break in. The engine is amazingly detailed and is guaranteed to look stunning on any layout. It also has lots of power and pulls lots of cars no problem. The only con I can think of is it would benefit from having some traction tires, as slipping could become an issue if any oil residue is on the track.