Nice solid bed and sturdier than I expected.  The ladder comes down to the end of the 1st bed, so you can fit a trundle which can slide in and out without being blocked.  for the trundle make sure to get a mattress that is LESS than 8" or it wont' fit.  I got 10" mattresses for the 2 beds and they fit nicely and very comfortable sleep.   The distance from the bottom bed to the top bunk is a little tight though but for kids it should be ok.