I recently purchased Dirt Devil's "Purpose for Pets," and while it really could have been a terrific vacuum cleaner, I was dismayed to discover it has a couple of really serious design flaws.
The first is that the cord that powers the power head is permanently attached to the power head, and plugs into the main unit. The cord must be attached at intervals all the way up the wand and, with clips, back down the hose. Whenever you want to use the floor brush or one of the attachments, all this must be removed and then re-assembled when you want to use the power head again. Not only is this incredibly inconvenient, all the extra wear and tear on these clips, attachment points and on the cord increase the likelihood of something breaking or wearing out more quickly.
The second problem is that you can't empty the cannister with the cord wound up in its keepers on the bottom because one end attaches to the main unit, and the other to the cannister that comes off for emptying.
There seems to be an increasing tendency to release products from development too soon, before the design is tested as it would be used by the consumer.
Otherwise, it's terrific -- great suction, nice hepa filter, compact, very nice electrostatic brush attachment for cleaning upholstery, a power button on the powerhead so it can be turned off for smooth floors, and perhaps my most favourite feature, a shoulder strap! Sometimes it's much more convenient to carry the vac, and so the strap is a nice touch.
It's new and it replaced a 20-year-old vacuum with serious age-related issues, and so of course, I'm enjoying it. But I expect that the design flaws mentioned above will prove exasperating and shorten the life of this product.