I looked at the duna fun large but thought it looked a bit of a faff if you need to get at a ham in the base. I have a mini duna, a duna multy and a kerry. I had my old robo in the mini duna as he didn't like the space when I put him in the multy (weird contradictory hamster, Hector was bold and shy at the same time
) but I like both of those. I have a kerry for my Syrian but I don't think I'd like it for a robo as I think I'd find it too deep but I do like the multy and if Hector was braver he'd have stayed in that as I think it's a good flexible space.