Whenever I hear of someone going to disney, I encourage them to use garden grocer.
I would recommend this to anyone but under buy not over as it is hard to through things away or leave it behind. We did purchase cases of water that was great to take to parks and then just ask for cups with ice. If you aren't going to spend much time at the hotel do not buy a lot of extras as you really don't have time to eat them. We had purchased dinning plan with no breakfast so that is mainly what we ordered and that worked well. it was a great experience and I would do it again.
So easy to use, very convenient, no problems! I will use this every time I go to Disney World from now on!