Middling suction power; fine for some jobs, insufficient for many others.
934429
Works fine. I wouldn't expect to clean up fine dust particles with this, or anything as heavy as wood chips, but it cleans up the sand on our patio and small leaf bits better than a broom.
3145669
This is a great vacuum for dust, but not so great for larger sized items. The floor roller component is very low to the ground and will not pick up things like dried peas, cheerios, etc. that are often found on the floor in homes with kids. Fine for dust and hair and very small crumbs, but pretty annoying to have to do a second pass with the nozzle attachment to pick up the larger stuff.
4325372
Good, but not great. If you use this, make sure your using a vacuum that you can control the suction amount. Mine would constantly get stuck to the wall or ceiling making me work harder.
4270634
Power in vacuum is decent. If you have light vacuuming and small particles to pick off the floor; this is for you. My main complaint is that vacuum filter clogs before the canister is full, which affects suction power. In addition, cord length is not that long.
4645246
This is a lightweight small vacuum that runs off what used to be called the cigarette lighter of the car.  These days they just have the outlets, and you have to pay extra if you want an actual ligher.

Never mind.  Lots of useful stuff runs off these 12-volt adapters.  The hand vac is not all that strong, but it is maneuverable and has a long enough cord to reach the back of my (small) car.  The crevice tool fits into those tight spaces that you can't reach otherwise, and cleans reasonably effectively.

There are no miracles here - power is limited and the dirt holder is small.  But if you need to clean a spill (of dry stuff) or pick up the leaves and dust and crud from your floor mats and seats, the Dirt Devil will do fine.

I can't compare to similar items as I did not do a lot of research.  If you have a lot of time to spend on comparing small appliances you may find a better one.  This one is good enough.

Would I have spent my own money on it?  Probably.  Should you?  Depends on whether your car-cleaning needs are light and intermittent or heavy-duty.  For heavy-duty look for something sturdier and more powerful.  Otherwise just buy this, keep your expectations reasonable, and be happy.
3866499
This thing does what it says, but don't expect it to clean a whole house.
3411861
My Hoover LINX combo pack  includes both the stick and the handheld vacuums, each with a battery.

The vacuums are COMPACT enough to store discreetly in a corner, at hand when you need them, NICE. They are rather FLIMSILY BUILT, I think, for the price, though this does make them AGREEABLY LIGHT IN WEIGHT. Forget the extensor nozzle on the handheld -- it simply doesn't work.

SUCTION is little more than ADEQUATE, given that the LINX is touted as the 'world's best stick vacuum', and carries a price tag appropriate to distincition. Whether this is a necessary tradeoff for the CORDLESS CONVENIENCE I can't say. I would be more forgiving of the anemic sucking power (esp. in the handheld) if the LINX weren't DISAGREEABLY LOUD.

FOR LIMITED SPACE AND LIGHTWEIGHT CLEANING, the convenience of the LINX will be worth the noise. If they could double the suction and dampen the noise, I would be one very happy customer indeed.
2127283
The dvice is not very powerful--certainly ok to vac a car.  But for sucking something wet, you are better off getting a vacuum that will reverse the flow.  If I had it to do over again, I'd spend more money on a more useful tool.
497097
The suction is very weak, like most of the other reviews say.  Probably not strong enough for "detailing", but worked well getting dust/crumbs from the desk.
318100
I love that it has a small hose attached as most handheld rechargeable units do not.  In fact, the hose is why I selected this model.  I bought this mainly for my sewing room which has a hardwood floor and for dusting baseboards.  It does both of these jobs well, however, the suction does not seem to be very strong.  While it meets my original purpose, if the suction was stronger, I would use it to vacuum the steps and my car both of which have carpet.  Unfortunately, they need something much stronger; that can remove dog hair.
1897308
This is a great idea, a little carpet cleaner perfect for small jobs and small apartments.  The problem is with suction.  It worked acceptably on the first tank, returning about 1/2 of the volume of water, but once I emptied the tank, I could never get a good seal again.  I had my husband the machine man look it over, and we used the manual, and I'm sure we got it seated correctly, but it barely sucked up 1 cup from the full tank of rinse water.  To make matters worse, you can't see the water going into the tank even if it is working, so you don't know until you notice the machine is getting lighter and lighter.
It is a great concept, a small light cleaner that you will be willing to get out more often, but it is not ready for marketing.
195992
I bought this to replace a cordless hand vac that could never hold a charge. So far this is decent for the job. Not as powerful as the old hand vac. If it is loose, the vac will get it. If what you're trying to pick up is sticky or the like then no. Last night I spilled some cocoa and used the vac to get it up. It got about 85% of it up, the rest I had to wipe up with a damp cloth.
1033060
The large ones are okay: the Med & small ones seem to pop off the window as soon as you put them on. The name "power suction" is a bit of a stretch
504284
Product has terrible suction. I wasn't expecting a whole lot power from a 12V, but this thing barely picks up anything
4823931
Suction power is great, but tools slip off easily while using; the coil that attachments attach to is flimsy and often gets kinks in it.  No place to store all tools on board and had to buy a floor attachment for my hardwood floors because the one provided does not work well
2368107
I went with the newer, higher end version of these Black and Deckers to vacuum the car and tight spaces at home. Unfortunately, it doesn't hold a charge for very long and loses charge rapidly when not used. Additionally, the suction power on it leaves something to be desired. It works fine if you have some light particles where you have full access, but it won't pull anything out of carpet or tight spots. It looks nice, and the charger has a small footprint, but otherwise, it could have been a lot better for the price. This can't be the best of cordless hand held vacuums.
2995270
It's ok, but the suction is not what I expected it to be! Also wish I had gotten a cordless one!