Motobuys was the only company I could find who offered an easy quick-ship policy on a Trailmaster go kart. The freight arrived as was planned and the parts were all there. We needed a mechanic to help us get it assembled and running and the carburetor needed to be cleaned out in order to get it to run fairly smooth. I purchased an upgraded carburetor, but have not yet put it on. We needed to google instructions online because there were no instructions included. I was able to get very limited technical help from the company. I would give them a higher rating if they would provide instructions and real help for assembly. I have also waited more than a month for the additional items that I purchased. I had to remind them a few times that I did not receive them. All in all, the product was a good value and our family had a great time using it.