I have the Bissell Proheat Deep Cleaner and love it!  I had a professional company come one year ( I was being lazy) and after they left I had to clean the carpet because it was not clean enough.  After that I just use my machine because I paid that company $150, I only paid $230 for my machine and use it ALOT with my 2 little girls and my light beige carpet. 

You will pull out lots of yucky dirt, you won't believe it was even in the carpet before.  Even if you just used it twice it would pay for itself.  And if you have little one's running around you really need this-they think nothing of...