CSR is our favorite mod for many reasons but I'll do it from our perspective when our DD was 18 months old.
The playground is not sand or woodchips which eliminates the sand in the eye and splinter problem. It is some kind of flat rubberized flooring that is actually a little bouncy -- great for toddlers. There is a climbing gym desinged for little ones as well. The playground sits by the very large pool and on the opposite side of the pool is the kiddie pool which has fountains and is only about aa foot deep. Perfect for little ones to run through.
The resort is not loud and because of its size it never feels crowded or overly busy. In the evenings, at bedtime, my husband and I would take our daughter on a stroll around the lake. It was beautiful, even romantic to stroll around with her in the stroller and the great part was that she fell asleep and we had a wonderful evening sitting by the fountains and relaxing and doing something we rarely have time for at home -- talking.
The food court is by far the best on property offering that largest variety of foods that will satisfy everyone. The great part is that you are seated by a waiter so you don't have to scramble around trying to find a table with a stroller in tow. You can sit with baby while your spouse goes and gets food the spouse sits with baby while you go and get food. Drinks are brought to your table and someone busses your table for you. The arrangement worked so much better for us than the the other mods where we had to searchfor a table then carry drinks all the while manuvering a stroller. The drawback for most people is that a 10% gratuity is automatically added to your bill -- which you pay after you are done eating not before. I didn't think this was excessive as I have always had great experiences with the wait staff here.
The restaurant is also very good although a little exotic for my DH's taste. However, the breakfast buffet is totally wonderful.
The rooms are very nice although we miss having two sinks. However, the playpen they provide for use as a crib fits nicely between the two beds and keeps the rest of the room free for traffic.
The bus service is the most dependable and, also, because of the location, has the shortest travel times to all the parks (unless you are on the monorail). This is great at the end of the day when you are very tired or in the middle of the day when you need to go back to the resort to relax. My DD always would have a meltdown mid day due to sitting in her stroller most of the time so we would go to the playground and pool to let her blow off steam and then return to the parks at night.
If you have any specific questions about CSR just ask. I will try to answer them as best I can as my family has stayed there over 15 times.
But as said before, any hotel has to be your choice based on your research. The research can be just as much fun as the trip once you get started.
have fun