While Wii Sports isn't going to dazzle you, it will provide more than enough fun times for you and your friends.
I especially owe a debt to Wii Sports in that it is one of two games that finally got my better half interested in gaming with me. If you have a significant other you are trying to get into your world of gaming; Wii Sports definitely won't hurt your chances of succeeding.
Being so simple, anyone is able to just step up to the game, and have fun swinging and flailing. The biggest challenge is letting the inexperienced win to keep the interest going, while not giving away what you are doing...
Tennis: A great game that is very responsive when swinging the Wiimote. You play 2 on 2 where you can swing quickly to get your forward player to whack at the ball or wait until the ball reaches the player at back court. There is not much in the way of prizes or customization, just a basic game of hitting a ball back and forth. Baseball: Another fun game to play that doesn't go into to much detail. You either pitch or hit; using the Wiimote to simulate both actions. You can make different pitches to try and trick the hitter, but the hitter just basically whacks at the ball until 3 outs.
Golf: Another game that works well. Again, not too much detail here but it definitely gives you a feeling of playing golf beyond just hitting a few buttons as with any other console.
Bowling: Yet another fun game as well. As with the others, there isn't any career mode or anything, it's just meant for quick fun thats easy to step up and play. You can set up spin on your ball as well as adjust your "line" down the lane.
Boxing: The only game in the bunch I didn't much care for. Don't get me wrong, it is neat to flail your arms and watch your Mii slug it out, but in the end it just feels a bit like you are flailing your arms aimlessly and scoring hits. In short, it just didn't feel as responsive as the other games.
All in all the games give you an idea of how awesome they would be if fully focused on and developed as their own games. I for one look forward to full Tennis and Bowling titles coming out. This game is a great package that anyone can step up to and play with no previous game knowledge. The only reason I didn't score it higher is because I don't see much fun in the game playing as a single player, but the multiplayer fun is restricted only by how much beer you have.