Only one of the two games are good. You're better off with SMB/Tetris/NWC.
While I must admit that some parts of this game are good, it gets boring really quickly.
Let's start with the worse game of the two, Super Spike V'Ball. While the spiking is fun to do, it just gets boring really quickly. Even if you constantly play this game, it will be no longer than two minutes. The graphics are not good at all, the gameplay is way too easy, and there are occasional glitches.
Now for the other game, which I must admit is pretty good, is Nintendo World Cup. The gameplay is pretty good. You can attack the other players (though doing it too much results in one of the players temporarily being out of the game), and the sprite movement seems pretty realistic.
The graphics for Nintendo World Cup are overall good. The screen side-scrolls and the character sprites are really nice. There are two minor things about it though.
The first problem is that the viewing for the score is way too simple. There is also no halftime performance at all, unlike Soccer for the NES.
You also don't control all of the teammates. You only control one person, and you can not even switch, which is a drag. On the plus side, you get to choose how your teammates act.
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Ultimately, the volleyball game will entertain you for a few minutes, and then you will hate it.
Nintendo World Cup though is pretty appealing though, but only get it if you like sports games.
You are probulay thinking that you want to get this game because it's Nintendo World Cup (which is not bad) thrown in with another game. But you are better of getting another NES game called Super Mario Bros. / Duck Hunt / Nintendo World Cup. It has the better of these two games, thrown in with two other amazing games.