Embeded dirt finder is the coolest thing ever in a vacuum

We bought this vacuum based on the good reviews but I just had to write another one after using it. When I started using the vacuum I thought the "embeded dirtfinder technology" was the biggest gimmick there was. After using the vacuum for a few minutes I realized that it actually works. There two lights (one red and one green) on the lower left corner of the vacuum and they switch from red to green when the carpet is actually clean. I thought to myself "yeah right" but when using it, the light stayed red for a long time in high traffic areas of my house but in the spare bedroom where no one ever walks it was green almost right away. I really worked harder on those high traffic areas to get that solid green light and I really feel like my carpet is clean now. Give it a try - it makes vacuuming much more entertaining.