Is the Shark NV352 good for stairs?

Yes. The canister lifts off the upright base and can be carried, so you clean stairs with the wand and a tool instead of balancing the whole vacuum on a step.

Does it work on hardwood and tile?

Yes. Switch off the brush roll and use the wand or the floor head on bare floors. It is tuned for carpet, so fine dust on hard floors may need a second pass.

Does it have a HEPA filter?

Yes. It uses a HEPA filter in a sealed system, which is why allergy sufferers are drawn to it. Rinse the foam filters regularly and replace the HEPA filter when it clogs.

How does it compare with the newer Navigator Lift-Away models?

Later Lift-Away models add features such as a self-cleaning brush roll or a larger bin, but the NV352 keeps the core lift-away design and strong suction at the lower end of the line.

What comes in the box?

The vacuum, a crevice tool, a dusting brush and an upholstery tool, plus the wand and floor head. Tools store on the unit.

Is it corded or cordless?

It is corded, so you plug it in and are limited by cord length. That is part of why suction stays strong, but it is less convenient than a cordless stick.