While this is still fresh in my mind (I went 2 weeks ago)... As other's have said, "worth it" depends on where you place your worth!
My tour was at noon, with an 11:30 check-in. I checked in at 11 (couldn't remember the time to check-in!), where I chose my meal (turkey sandwich, seasonal fruit, Mickey sugar cookie, Diet Coke), got my name pin, and then took a ride on the train until it was closer to time for the tour. Just before noon, we got our listening devices, tested them, then went on our way. Our tour group was 16(!!) people. (A little big, I think; perhaps 10 would have been a little better.) We walked around to various places, hearing the dedication of each land as recorded on opening day. We rode Alice in Wonderland, then the train over to Tomorrowland, where we had a quick potty break. We went to Great Moments with Mr. Lincoln near the end of the walking tour. At that point, they split us in half, and one group did the apartment while the other one sat at Tour Gardens for their meal. Contrary to how I had seen pictures in the past, they didn't take our picture next to the lantern--instead, we were in front of the seat/Walt's bed. In one picture, you can see the lantern, but that's it. We were in the second-lunch-group, which was wonderful--we leisurely ate our lunch, chatting up the CMs for nearly an hour. They also give you your special Walt pin at the meal time.
I learned plenty of new things, and had a fun time. Would I do it again? Maybe if the Royal Suite or Club 33 was on the docket, since I've seen Walt's place now. ... I would likely recommend doing an earlier tour, as we didn't sit down for "lunch" until 3:30pm, by which time we were all pretty darn hungry!