Well, clean carpet is always feel good. Whenever you get your carpet clean it feels absolutely amazing to walk, seat or even lay down on it. However, cleaning a carpet is not an always a good option. It always depends on how old the carpet. The longer you have the carpet, the more dust and dirt it builds inside. If you got a several years old carpet so, the best option would be just to replace it (even it could cost a bit more than cleaning) rather than cleaning it. Because cleaning it would be just temporary thing. I had personal experience at my house so since that I always recommend replacing it, if it's too old.