we've got that cage too
@George and Max we love it, it's so sturdy. The price has gone up a lot since we bought it 2 years ago, I suspect the demand for bigger cages has made suppliers realise they can get away with charging more. My OH made a loft to add an extra dimension for Spike and Peanut. The upstairs is now completely filled with an underbed storage box with a door cut in it at the top of the ramp, I fill it with hay and they eat, burrow and sleep as they please. I cover the ramp with vet bed off cuts to make it softer on their feet.
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The ramp on the top slotted into the side of the saftey rail so they could come and go for floor time, this wasn't popular as they don't like full floor time and prefer a playpen!