Wwyd if you were given a pocket dimension 3m cubed?
Rules:
*You can teleport into and out of it at will
*It has a couple of plug sockets and can connect to internet from the region you teleported in from
*You can take objects and people with you
*As already stated, it is (3m)^3 (3m*3m*3m). The walls are plain plaster with a light in the middle of the ceiling. The pocket dimension is topologically toroidal, so if there weren't walls and a ceiling/floor (which you can actually destroy) you would loop if you went more than 3m in any direction. Gravity, then, is artificial and can be altered to anywhere from 0 to 2g from a dial on the wall.
Edit: additional specifications
*You can only teleport out to where you teleported in from.
*Time proceeds at the same rate inside the pocket dimension
*There is an eject button for those inside to get out if something happens to you
Are there any restraints with any kind of outside object your pocket dimension is anchored to? It sounds like this would be super exploitable to pull off some cleverness just as an "invisibility cloak" (although presumably you couldn't see your surroundings from the inside, or it'd really be OP), let alone if you're not tied to a physical object. If you wanted to, you could probably rob banks and overthrow countries with that shit.
Also, the police cant catch you because as soon as they are about to get you, you can just teleport. Alternatively, while in the moving police vehicle, teleport away and then return an hour later. You'd spawn by the road but not in the car anymore.