Due diligence first, of course, but if I can grill burger patties in it, toast the buns, AND get a little melty cheese action, all in the same appliance, could be well worth the $350-ish they charge for it.
One thing I'm looking forward to making is an at-home Sourdough Jack. Favorite sandwich from Jack In The Box -- there are not JITB's on the Rim, just like there were none in the Mid. So I learned to make my own. Take some Thousand Island, add a squirt of Dijon mustard, a squirt of Sriracha, and mix. Toast two slices of sourdough with a pat of butter. Grill two patties, melt a slice of Pepperjack over each. Et voila.