First off, one should know not to take this special very seriously. For one, the special shows every single character attending the sports festival (even already dead characters). I myself enjoyed pointing out some people like the 4th Hokage and Itachi from the crowd. Second, the plot revolves around Naruto needing to use the restroom, but to his dismay, he just can't seem to find a toilet without interruptions. The animation in the Sports Festival is the same animation used in the actual movie, so it is high quality in terms of detail. The sound is... Well it sounds like what any Naruto scene would soundlike: Naruto sceaming, background music being fast-paced, and Naruto screaming some more. The characters pretty much act the same with Shino being his weird self and Shikamaru complaining about every little thing. But what got me was Hinata trying to tell Naruto her one dark secret about him. That seemed out of character to me.
And as for the enjoyment part of the special? It really depends on whether you enjoy watching a 20 minute show full of nothing but "I NEED TO FIND A TOILET!!!" or not. Overall, this might be fun to watch the first time, but you really don't need to watch it a second time.