Hi. It's a very nice cage

I will leave others who have used them regularly to add a bit more (I've only tested one out) to add further comments but
@Tulsi has one and is happy with it. As for whether it's big enough - the actual floorspace at substrate level is the same amount of floor space as inside a Savic Plaza. Actually very slightly more than that - it's just a different shape - less wide but deeper. With the base filled with substrate at least to the level of the perspex. Both are on the minimum size end of the spectrum - very slightly under 5000 square centimetres of floorspace - but a good size - although some depends on the hamster. If it's for a female syrian I would get something bigger. For most other hamsters it's ok. It is quite expensive, but there is less to buy for it as it already comes with a good wheel and two cardboard multiroom houses

Again though the wheel is 27cm - slightly under 11" - which is fine for an average syrian and for dwarf hamsters but a particularly large Syrian could do with something bigger than that. Rachels Got Hamsters on youtube also uses them for her dwarf hamsters.