"The kind that you enter the bath from the bedroom, sinks in main area, pocket door to toilet and shower. " THIS kind, with a double sink, if there is room. We have it and enjoy it. The other kind, where you have to lock/unlock two doors every time you want to shower/potty is very obnoxious to me. My mom has one in her home, and I have shared that J&J with various relatives or guests. Nearly every time I have shared, someone forgets to unlock the door when they are done. Maybe it's different because guests aren't in the habit of doing that each time, but I find it annoying.

I'd paint the walls a sage green. It's gender neutral. Do the ceiling a shade or two lighter. Paint the bookcase the same color as the wall and put it up on top of the dresser. Because it's a kids room fasten the furniture to the walls so it can't be pulled down on the kids. Her vanity I'd paint the same shade as the walls and then do a very puffy skirt on it in the green with some pink thrown in. Think of it as a ballet skirt lots of netting, glittery fabric. You could attach the skirt with a staple gun and then glue gun trim over the top to hide the staples. I'd give any stool or chair you get her the same treatment. A oval mirror above the vanity would be darling. I'd be incline to use green and white checks for the window treatments and bedding covers however knowing how kids are and depending on their ages that might be a battle you won't win. They all seem to love their special character bedding no matter how much it doesn't go with the room they are in AND since they are kids I wouldn't fight it. Save that battle for when they are older. I would give each child a white board and a cork board in their bed area to write on and to keep things that are important to them hung.

I only have 2 children, a 14 yo girl & 17 yo boy...and we have 3 bedrooms & a playroom upstairs (master is down.) My son's room has its own bath, but we actually added another door so it also opens to the playroom. So glad we did this! Our daughter has a Jack & Jill with the guest room. She has her own very large vanity with a sink and drop down counter area where she can sit & apply makeup. Her large, walk-in closet in is this dressing area as well. There is a door to the shared toilet/tub area, which of course connects to the vanity area of the guest room. The guest room vanity is much smaller, a single, and the guest room closet is just a small walkin in the actual guest room, not the vanity area. If we had 2 teen girls sharing this set up, the one in the guest room would definitely get the short stick! Since we custom designed our plan & knew we were only going to have the 2 children, our set up works just fine. Dd was 8 when we built, and we knew the teen years were coming. Teen girls just have so much crap! Personally, if I were you...I'd make the two older ones involved in the process. I bet they would prefer sharing a J&J to having a hall bath. Make sure they understand you are not getting involved in any fights & that they have to figure out a system. It will be good practice for college where many dorms have this type of set up now. The little ones can have the hall...and when your littlest dd becomes a teen, the other girls will be adults & she can have the J&J to herself!

It closes into a recess that has the same effect as a door jamb. Sounds awesome to me! My builder-grade hollow-core doors all permit light and noise to come through. I never really noticed until my daughter complained of light penetration into her bedroom (from the hall) at nighttime. Sure enough, I go in there when everything's dark, shut the door, and it glows. Maybe you have better trim/jambs/doors than I do? lol I've never lived with pocket doors -- doubt I ever will because I hate doors on tracks -- and the ones I've seen are from a few decades ago, but are your tracks on the ceiling or the floor? If on the floor, are they a pain to clean? Tracks on the floor would be another reason for me to dislike pockets. ;-)