I have a Foreman-type grill - actually branded with Jamie Oliver's name, but more or less the same thing.
It gets most use in making cheese and roasted veg panninis.
However, most times when I am smoking something on the pellet grill, I tend to pop in a pack of 4 burgers as well. After cooking low and slow, I let them cool and then refrigerate. Then when I want a quick burger fix, I just shove a couple on the JO grill until they are heated through. Provided I don't overcook them initially, they are tasty and much nicer than if I had just cooked them on the JO grill from scratch.