On a quick read, it looks like the BEST coverage differs from full warranty--in practical terms that would influence most of us--mainly in that mechanical breakdowns performed at no charge under full warranty have a flat $50 fee under BEST. Other items, like keeping maintenance records, also apply, but the $50 is what jumps out at me. And frankly, since virtually no service would be billed under $100-200, a $50 fee still offers a lot of peace of mind.