The Stretch Thing is your "go to" performance shortboard, your step up and your groveler all rolled into one board. Things are generally a little shorter and wider than a comparable F4, resulting in the same volume and wave catching ability.
The Thing has an incredibly wide range of use due to its flat entry rocker, wider nose and 5-fin FCS fin set up. This board board can generate or control incredible speed. Having the option of going tri or quad, let's you dial in your Thing to the waves you are surfing.
If you're not super stoked on the "hybrid movement", but want a shortboard with more range than what you're surfing on now, the Stretch Thing should definitely be on your list!