We've got a Jayco X213 which is 24' total length. It's got a king hard slide out bed at the rear and 2 decently wide bunks at the front. I'm claustrophobic so climbing into the top bunk freaks me out, but as long as I get my feet to the closed in end and my head to the open space quickly, I'm okay. The top bunk is tough to get into though. Both of my younger kids love the top bunk. The littlest is too young to sleep up there as she has the potential to fall out. The 8 year old though thinks it's an awesome space and it's very cozy for her to sleep.
We love the size as it fits in our driveway. So for the summer, it will stay home on the driveway and we can leave at a moments notice without having to pick it up out of storage. We can actually even extend the king bed if we need; it extends INTO our garage while the rest of the trailer is in the driveway. It's kind of a cool party trick. ;)
We're a family of 5 so the extra space we get by being able to extend the bed is nice. The king bed is huge for width so our littlest sleeps with us now, but when she gets bored with that, it takes all of 5 seconds to flip the couch into a bed as it's a jackknife style.
I also like that the bathroom is straight ahead when you come in the door so the kids don't have to go through the entire trailer when they need to use the bathroom. I've always wanted a trailer that had outdoor access to the bathroom, but I preferred something shorter to be able to get more of the sites with trees rather than RV parking style, and to be able to keep it on the driveway. So the bathroom straight in the door is a decent compromise.
