Bo's previous owner used to clean their rooms with a handheld vacuum when she was a kitten, so she is very used to the vacuum cleaner. She sleeps through the vacuuming process.
Speaking of vacuum cleaners, I own a Rainbow and it's the absolute best vacuum I've ever had (I owned Hoovers and an Electrolux prior to the Rainbow). It's expensive as all get out, but it uses water instead of a bag and talk about clean!! Pet hair, rug fibers, drywall dust, litter box filler, paper, you name it, the Rainbow sucks it up. It is recommended for use in homes where people suffer from allergies, and it's attachments make it useful for cleaning everything in the house. I use it to dust and vacuum furniture, freshen cushions, even clean up liquid messes on occasion. The only place in the house that it can't get to is the stairwell because it's cord isn't long enough. For that I use a handheld Royal. The water is much more efficient at filtering dust and dirt from the air, and it doesn't clog up like a bag or canister. All I do is flush the dirty water down the toilet and fill 'er up with clean water when I go from room to room.