The shark vacuum is amazingly powerful, the cleaning power was great, it is very easy to change the bag, and its reuseable. The bag lock is this vacuums downfall; a small piece of plastic held on by a thin piece of wire. After a few changes of the bag, this latch just broke. I tried to see if it was replaceable, but it isnt. It needs to be sent in to be repaired. If your willing to void your warranty you can replace the wire with something stronger, or just be more careful than average when changing the bag.
Before the unit broke, it was great, a nice powerful little vacuum, and not bad for weight, nice for the stairs. There was a decent assortment of attachments to go with this vacuum as well. For the price ive seen it listed its well worth the price.