I am a huge fan of Shark vacuums.  This vacuum is amazing.  With 2 Akita's and with one of them being a long haired I needed something that would last.  My first shark was purchased about 3 years ago and it is still going strong.  The lift away feature makes vacuuming so much easier and I love that it is so light weight.  With the amount of dog hair in my house I usually have to dump the container out 2 to 3 times while vacuuming, If you continue to vacuum with the container full it will shut off for awhile to cool down.
Oh and the dog hair does not stick to the roller!  By far the best vacuum I have ever used.