Flipping HOUSES?? Good Investment?

For those who don't know, the term ';Flipping Houses'; is when you purchase a house, fix it up and sell it for more money to make a significant amount of profit. Does anyone know if this is a good road to take? A high risk? A low risk? Have you had experience? Tips and Knowledge? What can you tell me about it? I would like to know because I'm really thinking about doing this.