I recently moved into a home that the previous owners had the carpets "professionally" cleaned. I am quite allergic to cats and I could sense my allergies reacting to the carpet. I decided to purchase the Big Green Clean Machine based on the reviews I've read. This machine cleaned the carpets beautifully! Each time I dumped the used water, I was in awe with what was extracted! This machine is better than any cleaner I've ever rented. It's somewhat heavy, but I presume it's because it's so well made and powerful. I am very pleased with this purchase and recommend it to anyone whom wants a deep carpet cleaner.