What was difficult was deciding whether to buy a regular model or spring for a Dyson Animal (the Holy Grail of vacuums). After reading a LOT of reviews and talking to friends and family, I bought a Hoover Wind Tunnel Pet Rewind. It seemed comparable to the Dyson for less than half the price (and believe it or not, there are some bad reviews out there for the Dyson). After one use, I'm VERY pleased with the Hoover. The carpet looks great - I had to empty the container twice, which I took as a good (if yucky) sign. All the attachments are conveniently mounted on the vacuum, so I can sweep over the couches as I go by. But it took a long time to vacuum because I had to stop and adjust the floor settings a lot. And change outlets a lot, because the cord is kind of short (but it automatically retracts!). We'll see how it does over time, but I'm happy with my purchase.
Sorry to write an entire post about a vacuum, but this is me:
(Of course I haven't been compensated in any way to write about this. If I was getting paid to write on a regular basis, believe me, you would know. :))