My 2 girls (4 yr and 6 yr) both love their beds.  It is really durable and well built.  You need atleast 2 people to build it but it is very easy.  As long as you can read and follow instructions and know how to operate a screw driver you should be able to build it in 4-5 hours.  The best thing I like about this piece is you can separate it into 2 beds and put the stairs anywhere.  But the best thing of all is the weight limit.  For the upper bed they say the wait limit is 400lbs, which is no exaggeration.  I am 200 lbs and sometimes my kids want to sleep with me and I was able to get on top of the bed and sleep beside them with no issues except maybe getting up the stairs which are little narrow for an adult my size.