I ran a ferrit cage for a number of years.
Positives:
24x36 base, with removeable slide out pan, 4ft tall or more.
very good visablity due to not having 50% of the view blocked by screen
very sturdy because its made out of heavy gauge wire
ITS ON WHEELS
Negatives:
Only for adults, juniors can weasel right out of them
On that note, wrapping it with screen is not a good idea unless you are very good. Its too easy for a youngster to get stuck between the cage bars and the wrapped on screen.