With our second child on the way, we decided to get bunk beds, and we and our daughter loved the Erin bed we saw in the store. We were a little concerned that our daughter (just turned 4) might struggle getting up the ladder to the top bunk, but she would be fine on the bottom for a while anyway, but she manages it perfectly. The steps are deep enough for her to get a firm footing, and the guard on the top bunk is high enough to ensure that she wont fall out, even though the manufacturer suggests that a child should be 6 before going on the top bunk.
Assembly was straight forward (although as with all things like this, you should allow 2 people 8 hours to get it done).
The only slight quibble is that the holes on the base for the bottom mattress didnt quite line up perfectly with the holes on the brackets to secure it in place, but some of them lined up and the unit is secure enough to ensure the mattress is going nowhere.
Very happy with it, and our daughter is too.