Overall the loft is great, but there are a couple of minor things keeping it from 5 stars.  The height is good, leaving room underneath for easy access and play while also not being too high so there is plenty of room to sit up without feeling like you are going to hit your head on the ceiling.  It has a sturdy feel to it even with an adult (165lb) on the bed, but it does move enough that some top heavy things on the desk fell while climbing up and down. 
Some negatives to be aware of:
1) The loft had a strong paint smell when we opened it which took a couple of days to go away
2) Assembly took a while and it would be extremely difficult without a 2nd person to help
3) The desk wood has deep grooves, which means writing directly on it is worthless with a pen or pencil and cleaning a spill will be very difficult