Rug doctor? I have to clean my carpet! There are traffic stains everywhere. And...

I have to clean my carpet! There are traffic stains everywhere. And also pee from my stupid dog. Does anyone know how much a Rug Doctor is to rent? Does it work as well as they say?
Answers:    I love using the rug doctor. I am eventually going to buy one. The row of cleaning products that they have are fine, but I use regular Arm & Hammer detergent. It makes the house smell wonderful. If you hold a house that is about 1500sq. ft., 24 hours should be ok. I hold about 3200 sq. ft., so I rent it for 2 days. I hope that helps.
Ya, its fitting enough to clean a white throw up stained runner. The cost varies depending on which one you're planning on renting. Either the Mighty Pack (20-25$) or the Wide Track (25 - 30$). You can also buy the new Urine Eliminator spray. Yes, and be prepared for lots of rugged work! At home depot it should be about $40 a day to rent one. If it is a sizeable area or your entire house...call someone. Usually they run deal because they are slow this time of year. You can get all your carpet in your home cleaned for as little at $150! Good luck, hoped that helped you out!