Ok, I've seen the thread on what age to switch out of the crib. But in your experience what has worked better for your kids. Did you go out and purchase a toddler bed or did you just buy safety rails for a regular bed?
I've even thought of just placing the single mattress on the floor.

I think buying a special toddler bed is a waste. I mean it's the same size as a crib isn't it? So either keep them in the crib or put them in a bed-it makes little sense otherwise.

Rails work great.

I think they pass through the toddler phase too fast to justify getting a bed then. I agree with GoodStuff to just get regular bed and use rails.