Good for more adventurous guinea pigs
I bought this for my 4 guinea pigs - 2 of them love climbing and exploring so absolutely love it, and spend most of the day lounged on it. The other 2 aren't quite as agile and prefer to stay low down, so they kept pushing it over and didn't even attempt to climb up it. In all it's a really good product for smaller, more agile guinea pigs.