| I've used it as a campaign-specific trope; "Bag Worlds" or combat in places that is bigger on the inside than they are on the outside occur on the hex grid because of the weird non-euclidean geometry present in the area.
So far, it's been used as an interesting combat curve-ball in a campaign. The strangeness of the combat isn't a game-stopper, save for Bursts being "play to fit". I've played around that by using more solos/elites during the encounters matched with some lower-level lurkers/minions so that burst attacks don't feel off-kilter when the Sorcerer tries to drop 5 skirmishers at once.
However I haven't made a try at being a strictly grid combat campaign, and don't know how that would work out.
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