Hi, as Petite stated, that cage is not big enough and for a robo I would consider the gaps too big. I can't seem to find the bar width but it does look quite big. For a robo I would be looking at 6-7mm bar widths. They can get (or try to get) through the tiniest of gaps.
Going by your link, I presume you are in the Uk?
This thread that I did re all different types of cages might help you,
UK Hamster Cages 2021
Unless you are buying 2nd hand or going to make a cage, I think the zoozone large is probably about one of the best buys at the moment, you would still need to mesh the top part.
Bin cages are also a cheaper option, if you have the tools to make them. They need meshing, drilled holes is not enough ventilation.
Hope this helps.