Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Excellent quality, easy to build

As others have stated, this trike is very well built and the air-filled tires make for a super ride. There is no problem putting it together -- those who have stated there is must have tried without looking at the instructions. The instructions use no words, but the drawings are crystal clear, with closeups for areas that might be considered difficult, and the steps and pieces are all numbered or lettered for ease of identification and order of assembly. From box to the first ride was less than 20 minutes, and I am not a mechanic or anything other than a normal father.