Some reviewers seem disappointed that the 3D effects in Toy Story & Toy Story 2 were not more dynamic. Of course, the movies were not originally designed in 3D, and that actually is a strength, in my view. What carries both movies are the great stories. Despite watching them multiple times, my wife and I and our children enjoyed the 3D versions because the plots are so strong in both films.
Some of the latest films use 3D almost as a gimmick. In Toy Story & Toy Story 2, the understated use of 3D complements the movie nicely, rather than overpowering it. It adds to the visual enjoyment, but is not the main attraction.