I absolutely love my Flojet macerator and it's been trouble free in the 3 years I've used it. The one thing I do make sure to do is each time I use it I reach down inside of it with a needle-nose pliers and remove hair and debris from around the blade. Like anything mechancial there always could be a problem so I do carry a backup "stinky slinky" but feel it's unlikely I'll ever need it. If a failure is a huge concern I think you can get a replacement motor to carry as a spare for roughly 1/2 what the full unit costs.
