My friend lent me her Miele vacuum when she moved to Germany for 1 1/2 years and it was a DREAM! I finally got my own and I'm obsessed. She had the Classic C3 for comparison, I haven't noticed much difference in the performance. The suction power is amazing, I believe just the same as the C3. I love that the debris is collected in a bag and I don't have to empty it every time. The power cord isn't as long as the C3 but it works just fine for my 600sqft apartment. There isn't a compartment for the attachments, so they sit on the hose which I don't mind at all. I've only had this vacuum for a little over a month, but so far it compares to the C3 pretty well! I love it.