here's my exp. w/ harbor freight stuff... the store is generally thought of as a budget tool place.
they sell their own brands on many things... at least i've never seen them anywhere else. Chicago Power Tools is their major brand and some others.
if you want crap buy all the small hand tools they have in their bargain bins. The bigger tools they sell like tile saws and compressors and things that don't really break like chains are the type of things i really like to purchase from there (broken a few HF hand tools but no power tools as of yet). if you're worried about breakage on power tools they sell affordable "throw it in a river" warranties that i get for all of those types of purchases... usually an extra 10-20 bucks unless you get the really high dollar stuff.
there probably won't be an optional warranty on the hoist but there should be one for the trolley.
i am a firm believer in the widely accepted harbor freight philosophy... you can buy 10 harbor freight tools for the price of one Mac, SnapOn or Craftsman and never have to go through all ten in the time it takes you to get through the one.
if you've never been to harbor freight... it is a true sight to behold.
almost as nice as walking into a tire shop and taking a big whiff of all the fancy new tires.