How funny I just moved one of my syrians into an Imac Fantasty too and she also loves it, but I didn't get her the extension yet (must have cost you a fortune?!) because she's only a few weeks old so I still have time to save up.
The only thing I don't like about this cage is trying to get hammies OUT, but I've just figured out how to take one of the roof "rounds" out, hand hammie a treat and grab
otherwise you would have to take the whole thing apart
But I really love this cage, so does hammie