Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Great for the Thomas the Train lover

My 3 1/2 year old son loves Thomas and received his first oval track for Christmas last year from a relative. It was always one of his favorite toys, but he was getting a little bored with the same small track, so this year we bought him the Mountain Overpass set. He absolutely loves it, but does get frustrated because, like the other reviewers pointed out, the battery operated trains do not run well on this set. The twists and turns are very tight, and the trains constantly fall over. Also, before buying this set, be aware that the larger, plastic battery operated Thomas trains do not fit through the tunnel at all. My son was very upset about that when we first put the track together. Overall, it's a great set for any Thomas lover, and my son does love playing with his non-battery operated trains with this set, though it would be nice to find a set that's geared towards the battery operated trains.