Instruct: Classify an Amazon review into positive or negative sentiment.
Query: Thunderbirds are Go!

My three year old son calls this his Thunderbird seat. He is extremely pleased with it, especially the cup holders. He sleeps in it easily but tends to look a little uncomfortable - with his head hanging down at a strange angle - it should recline a little more or have bigger side restraints to lean his head on. It's great that it folds for storage in Dad's trunk and is easy to travel with. The 'travel case' turned out to be a cardboard box it came in with plastic locks on - these are broken after one flight - we were not very impressed with the travel case as we were expecting something more substantial! A good extra booster for the price.