I'm not going to review all the restaurants that we ate at because many other people have done a better job than I could. I do want to clear up some misconceptions about DP "rules".
The cast is my DH and myself, both in our early 40's. We have been to WDW many times, and have eaten at nearly all the CS and TS restaurants. DS and I went without DH last year during
free dining - this is always the time we travel so the free dining is a nice extra.
No sharing - false! We shared every CS meal and at 2 TS. For some reason, I'm just not hungry when we travel to WDW. Probably a combination of the heat and walking around all day. Not one server acted like sharing was a problem. Note that we didn't eat at any signature restaurants, and obviously didn't share at LTT. We tipped extra when we shared at TS.
You can't "treat" other people - false! We had lots of credits, and treated my GF and her BF at Le Cellier. I asked beforehand, and both servers I spoke with seemed surprised that there was even a question about that being a problem. We also used more than our 2 credits at once at The Earl of Sandwich - using credits left to get food for the plane.
The service is not good if you are using the DP - false! We ate at LTT, Le Cellier, Kona Cafe, Sci Fi Dine In, and Maya Grill and had excellent service each time. The severs actually seemed happy that we were on the DP; especially since we knew what we could order without being told. We got our dessert to go most meals. At Sci Fi, the waitress made a point to tell us that we could get milk shakes as drinks. We tipped extra at every meal for excellent service.
We noticed a lot of empty tables at each meal. I don't think they were taking walk ups though (except at Sci Fi for lunch). I'm guessing that they were trying not to strain the kitchens in order to keep up the quality?? Or maybe a lot of people didn't show up for their ADRs, who knows?
One "rule" we didn't have to contend with is the child/adult credit issue. I can't see why you would pay for a child's meal to get extra credits anyway, there is so much food I wouldn't even want more!! It is prohibited as per the brochure you get when you check in, but I also saw lots of kids with those sneakers with wheels, so we know WDW isn't good at enforcing their rules!
The next trip we take to WDW, I would purchase the DP for the first part of the trip, but leave a few days without it. The plan really ties you to WDW (the plan of course!), and we like to visit Sea World, the beach, and my GF in Tampa.