Pong doesn't suck, but it's also not the best. It's like Asteroids, Battlezone, Centipiede, and Missle Command, it's a classic game that is regarded as one of the first games, which automatically make it one of the best games.
I personally like the game, as it is addicting and fun with someone else, and all the remakes of it are good too, like Table Tennis, so it's a great game to play with anyone.