If she is not climbing out or even showing any signs of climbing, then I wouldn't worry. My main reason for the transition with my daughter at 26 mos was because I was going to be having another baby. With my son by the time he was 2 he was a big boy and the crib was cramped for him and I was worried he was trying to climb out. Do not get a toddler bed, they grow out of them way too quickly then you will have to transtion again, get a twin bed. If you do want to do it this young I recommend a bed rail or the mattress on the floor first, baby gating their bedroom. My daughter loved her crib and never even attempted to climb out of it so I waited until she was 2 1/2. I made sure there was a good six months BEFORE her brother came along so she didn't think she was being kicked out of her bed because of him. Both kids LOVED having new beds and thought they were so cool getting them, not one issue.
I tis totally your call and if you are expecting another baby something you may want to consider.