Just from my own experience, I have coslept with 2 of my 3 kids and it wasn't hard at allgetting them into their own bed. My pedi did say though it's best to do it either before 18mo or commit until age 3 because its really hard to do it between 18mo-3yrs. But I always did it before then so I really don't know, Casen was out at 11mo and Hayden at 12mo.
Also there are no statistics of a baby dying FROM cosleeping because that really just doesn't happen, when a baby dies of sids while cosleeping (which is rare) but alot of people assume thats why but usually there is some other reason..them not doing it safely (going to bed drinking, on meds, fluffy bedding), something was actually wrong with the baby, etc.
Just like with everything though there are 2 sides and you will be able to find info all over the place saying one is better, I personally think cosleeping is completely safe and better for the baby, and it also decreases the risk of SIDS over a baby in a crib, but everyone does what they feel is right for their baby, I def don't think people that don't do it are wrong by any means, it's just right for our family