Pros: no extra housecleaning, free from captivity, still tons of cuteness.
Cons: irregular visits, possible vector for diseases.
Meet my unnamed squirrels. I think I have 3 or 4 of them - a shy juvenile, a cautious elderly and up to two wild horizontal-wall-crawling race cars. They live in the something-like-a-park thingy nearby and visit my balcony a few times a day. Keeping an extra bag of almond nuts around just for them (ok, I nibble some too).
The youngest is still scared of me and rarely stays for a meal. Others usually snack a few on the spot and then run off to hide the rest (the flowerpots next door are gaining weight).