Today was incredible. Not only are the elephants well treated, but their well being comes before everything else. If the elephant is social, then you can come closer ; if not, a private home will be made to make it feel safe.
I learned a lot and ate very well. The guides are able to answer all your questions, and know the elephants by names, background, medical conditions, and habits.
I was able to prepare food for them and feed them by hand. The half day tour is very good too ; the difference is that you get closer, for longer, with the day "in the footsteps of giant". You also participate more and take an active role, understanding better what it means to care for elephants.
SO, I really recommand this experience. And if not this one, than the half day one ! Worth every penny, and more, since it all goes to help sustain these elephants' sanctuary (and promotes ethical tourism).