Never had one, but known two people that have.
The first said his was as mad as a box of frogs, but a good loyal pet, although prone to chewing.
The second person was warned by the first (we were all colleagues)...don't get one unless you're commited to spending a lot of time and effort on it.
He got one....mad as a box of frogs
. Used to carry massive lumps of wood and stones everywhere, get in the cupboards and eat the contents, it even ate a frozen chicken one Saturday night.
Mental....but phenomenal characters.