The thing we like best about the K3 series is its compact size which is lightweight and very easy to store in a closet when not in use. It also uses the same power head, bare floor brush and accessory tools as the full size Sebo canisters so it does not lack in cleaning power or versatility. We are very pleased with the ease of control and cleaning power of the ET-1 12-inch power head. It has 4 carpet height settings to handle all types of carpets, but you have to adjust it manually which does not make it a seamless process if you have low and high pile carpets. However, the power head attempts to help make carpet height selection process easier by signaling with an orange display light if the incorrect carpet height setting has been selected. Switching from the power head to the parquet floor brush or any of the three on-board tools can be completed in a matter seconds for easy complete cleaning. Vacuum bags and filters are also quick and easy to change. The vacuum bags are on the smaller size but that is expected on a small canister. We are very impressed by Sebo's accessory tools and are so glad the K3 integrates full size accessory tools as many compact vacuums have started to come with mini tools, less tools or combination tools which are not as good as full size accessory tools. The K3 comes with an 8" crevice tool which is actually stored onboard in an integrated spot. The upholstery tool has a standard design and is good quality with a designated integrated storage spot on the hood for safe keeping. The dusting brush has a very efficient triangular design and is kept onboard using a wand clip which we are not as fond of, but are glad it can be toted along as you vacuum. The K3 is German made for quality and durability. It has a sealed design and its S-class filtration system meets HEPA standards, making the K3 safe for those who sufferer from asthma or allergies. The K3 is a great choice for those who want a small vacuum that can tackle any type of carpet, rug or bare floor with ease.