Single cyclone. Passes most of the fine dust to the foam motor filter. Be aware that any repair part needed for the power head (brush roller, belt, wheels, etc.) require the replacement of the entire power head. They clean well enough and have decent suction. In the US, they are an "orphan" in the respect that repair assemblies (like the power head) are not available to vacuum repair shops. They must be ordered from the call center in India. In the US, to obtain warranty repair, we have to pay to send the machine to New York, and pay to have it shipped back (yes, under warranty) six to eight weeks later. Very few people have a Shark repaired, they simply throw them away and buy a new vacuum. The Shark warranty (in the US) doesn't cover 'electrical items'. Here's the quote from the warranty page of the instruction manual:
"If your appliance fails to operate properly while in use under normal household conditions, you must return the complete appliance and accessories with proof of purchase, FREIGHT PREPAID, to New York. You must enclose a check for $29.95 to cover the cost of return freight.
Non-durable parts including, without limitation, filters, brushes, and electrical parts are specifically excluded from warranty"