Thank you so much for your helpful feedback!
I have collected the Rody 3 from my friend, but I will save that for the Syrian hammie I might be getting in due course. Following your feedback (and having done a little research online) it seems like a Syrian will be much happier in there than my robo.
I live in France, the options here are quite limited... Are robos happy climbing gentle-gradient wooden ramps?
Thanks a lot