Fans will love it, everyone else probably won't understand it.
A game about Strong Bad seems like a great idea. The characters are quirky and offbeat and would fit well into a video game. TellTale games realized this and finally made a "Point and Click" adventure game based off the web cartoon.
The game opens with Strong Bad reading an e-mail asking him why he doesn't just pummel HomeStar and get it over with. He then travels down to the race track to beat up HomeStar and learns that a race is being held. You play from there interacting with all the characters from the HomeStar universe.
There is a lot to do SBCG4AP. You can make it through the main plot in about 2 to 3 hours if you just plow through it but in doing so you'd miss out on a lot extras. You'll get e-mails from time to time on Strong Bad's Laptop and he'll answer them. But before you can answer them you'll have to go out and do some research by talking to the various characters and getting information. You can make your own Teen Girl Squad comics, play Snake Puncher V, and find various articles of clothing to wear to take pictures of yourself and e-mail them to friends.
If your a fan of the HomeStar Runner web cartoons and like point and click adventure games them you'll have a lot of fun with this. If you've never watched the web cartoons then you probably should to see if the humor is funny to you before you buy the game.