Just back from 8 days/7 nights at CBR. Before I give my "review" below, know that my wife and I don't typically spend much time at the resort when we go to Disney (regardless of where we stay). We like to get up super early and tour all day so I won't have anything to say about the food or main pool area since we didn't use them.
We stayed in Aruba 51 (did not request anything...as we didn't really care if we were near the main pool/food). Going in, I was a little worried about the bus situation. But, there were absolutely NO issues. Using the My Disney Experience App to check bus times before leaving the room worked out really, really well most of the time. We could time when we left the room to get to the bus stop a min or two ahead of time. But...you have to keep checking the App as it changes times constantly. One time, the "next" bus at our stop said 7:41 AM (it was around 7:20 at the time) but when we checked 2 min later, it then said 7:25. Luckily we were ready to leave but had to really hustle to get that bus...so my advice is to keep checking the app when you are in room as it changes all the time.
They did seem to run two buses (one for Jamaica and Aruba and the other for Martinique, Old Port Royal, and the Trinidads) but only in the morning (makes sense). Only had to stand on the bus maybe twice going to the parks. Return service is what it is...mostly luck as to when the bus came. Seeing as how Aruba is the last stop, it really didn't seem that bad to wait through all the stops.
Two of the mornings we had to get to MK by 7:45 (for Early Morning Magic and Keys to the Kingdom tour). Was going to order a Lyft to ensure we got there on time but there were plenty of buses that early (park open was 9 each of those days). Actually got there by 7:30 each day we were NOT on the first bus of the day. Again, use the App to see if/when the buses are coming.
We did use the Aruba pool one time. Smallish pool but it did the job. Plenty of empty chairs when we went (around 2:30).
We had dinner reservations at some of the other resorts (Contemporary, Boardwalk, Yacht Club) and although we know we could use the bus to get to a park or Disney Springs then either grab another bus or walk to the resorts, we used Lyft instead to save a TON of time and not have to walk in the heat. Lyft to Contemporary was 11.50 (plus tip) and the other two were 5-6 bucks (again, plus tip). But well worth it IMO as we didn't have to deal with buses/walking. Lots of drivers around at all times. Very quick to get a car. But again, only two of us so didn't need to get a big car.
Sorry I can't report on some of the stuff most of us comment or ask about but if you do have any questions, let me know.
Thanks.