Naaman, I just noticed your signature.  I think that your spending too much on scotch and bourbon and not enough on rye.  
 
On topic, I love my Miele.  It's by far the best vacuum I've used. 
 
Bissell makes interesting products.  Unfortunately they are always under-designed, under-built and so are "under-realiable".  I have a Spot Bot that is fantastic when it works.  It's a neat idea and product.  Unfortunately I've already had one replaced under warranty.  My cousin has had one replaced.  When I talked to the guy at the repair facility, he said that they are very unreliable and have gotten a lot in.  Bissell doesn't even try to fix them, they just send out a new one.  I guess that they make enough money on the sale to still make money giving 2 or 3 during the 1-year warrant period.