i got my two youngest a couple of days apart right after christmas
i added a third in late february / early march and could not imagine life with just one
i am not sure how easy one is since i only had one for a couple days but two is not bad at all! it actually can make things easier on you because they have each other to entertain lol ... it is harder to detect who has the accidents during potty training but i did find that the one who caught on faster "helped" the other one know where to go...at least i think so
they two i got close together are about 5 weeks apart...and they just adore each other!