I bought this vacuum after at least 2 months of research comparing against Miele S7. I only came across it after seeing a Sebo BS46 commercial unit at work and found it curious to know more about Sebo. very expensive for what some might say looks old fashioned but it is very good at suction. once it adjusts the height, the suction and agigation is so good that it does propel itself forward even on carpet. pulling and pushing it does give your shoulders a good work out, as it holds onto the carpet but i can clearly see how clean the carpets are when compared to my old VAX air mach 3. the lid is an air tight enclosure, everything about it spells durability with thick plastic panels, simplicity of taking apart and putting together and its not a toy. 2 reasons i have given it a 3 star and not a full 5 is that you will need spare storage for the extra pipe and turbo brush, its heavy but not heavy as Miele S7. it would have been nicer if the pipe was longer, and it had a telescopic extending pipe. this is not a step back in time becuase it uses bags, the whole idea of vacuuming is to contain and secure the dust to safely dispose of it, which is common sense. the Bagless sound revolutionary but when emptying the container, the dust will expel around you, which defeats the object of capturing it in the 1st place. Buy the service pack with it and it will do you a lot of good in the time to come. the 2 best vacuums i could find are this X4 and Miele S7. The resons why i chose this over Miele S7 was: Miele bags were expensive, the front lid was a bit flimsy, weight, i didn't if the bag full indicator gives any noise or just shows a orange colour and the brush couldn't be easily cleaned. Despite the 3 star I would recommend the Sebo X4 but i have stated the slight drawbacks of owning one so that you are aware but the other alternative is the Miele S7, which has its own drawbacks, but as good as.