When you buy good power equipment, you should get assurances: a warranty that your hand-held equipment will work as promised, some advice to help you avoid operating mistakes, and a dependable place to turn if all else fails. So you know what to expect, it's a good idea to (1) review your machine's manufacturer warranty, and (2) ask your dealer about his own in-store make-good policy. Be satisfied with both. The last thing you want is to ship your equipment to a repair center for warranty work, then wait for weeks.
Look for the following: