I have two 'Irish' Twin toddler boys born 11 months apart. Ds1 is 2.10 and Ds2 is 1.11. We have some great days and obviously wouldnt swap them for the world but some days im ready to pack it all in!
They used to be dreadful for scraping with eachother but have stopped all that and teamed up together against dp and I!
they dont have tantrums and can be very kind to eachother but see everything as a game. If we are out walking, they think it is hilarious to run off. Their favorite past-time (when i walk out of room) is to jump on table and dive onto the sofa in a pile up fashion.
Dp and I take them for a walk every evening and if we go into the shop, we are liek a travelling circus 
We have started taking the buggy with us and if one runs off, its straight into buggy but they just dont seem to be learning!
when they do something they shouldnt at home, we give them one warning and if it happens again, we pt them into the highchair until they can play nicely. This does work for the short term.
Please, mums of toddler twin/'Irish twins' how do you cope????
When i only have one, they are absolute angels. They just seem to egg eachother on when together...