Lovely size and sturdy but with one flaw.
It is sturdy, and does spin silently, I barely know when hammy is in it. However, the inside is lined with cork. On day two he had urinated inside the wheel which was impossible to fully clean. After a week, he has now taken it upon himself to chew about a quarter of the cork lining out of the inside. I think I will try to replace with a plastic wheel now.