Great for rabbits, I'm sure, but definitely not for ferrets.
This was bought for 2 9 week old ferrets. Within the week they had escaped twice by forcing their way up between the cage and plastic base.
For a while it was fixed with cable ties but this week my female has escaped four times in the last 2 days, if not more simply by squeezing through the bars, something like a ferret nation, savic or furrat tower would work better.