It is SO amazingly accurate!
From Andy's room, to the arcade scene and Cid's toys, there's nothing these guys left out. Youtuber, Jonason's Movies, spent over a year creating this awesome pet project. They promised on the announcement video that it would be good, and they certainly kept true to their word. I can't help but smile like an idiot the whole time I watch it. It's just too good! Pull up a seat, grab some popcorn and enjoy! I guarantee you'll love it.
In case it's been a little while since you've seen the original Toy Story, or if you just wanted to see the two side by side as a comparison, Jonason has you covered. It also includes commentary by him and one other person who helped create the movie. You can view that video here.