Open my eyes = look
How does that tell you how they perform given you can't try them out in shops?
Considering the type of product it is, and depending on the state of your house it is not the most used item. (I hoover twice a week at best, have a pretty dust / dirt free house).
For what it is, imo such deliberation seems totally unnecessary to me.
'Such deliberation'? He posted a thread on a general discussion forum. The only deliberation in this thread really is the pointless arguing from yourself.
You fail at the internet.