Worthwhile but not real powerful
920173
Not lots of power, but more than enough for most listening.  Very strange volume control as it resets itself to almost inaudible, and then you turn the knob way more than you'd expect to get the volume up.  No channels shown for the radio.  But really, for the price, it's hard to beat, plus it really does look cool with all the blue lights.
1533414
The flavor is good, but not particularly strong. I found that I needed quite a bit to make a difference.
1305853
It's ok,  but,  this isn't any powerhouse.  I would expect this to burn up under heavy constant 200-300 watt loads.  Then again i didn't buy it for that as i needed something to power a set of homemade speaker in my basement and outdoor speakers on my patio.  Does the job a decent volumes although I'd be leary of cranking it,  ive had more expensive recievers that supposedly put out less wattage with larger transformers and heatsinks that this thing has. The remote comes in handy.
445295
this is a truly enhancing acceleration;  however not giving a huge difference in terms of power
3325771
This is worth the money but the sound quality is good but not great. It's too small and under powered (battery) to be a good speaker even for its size.
However its well worth the money and build quality is excellent.
2525019
This receiver has a lof of useful funtion.

However, Sound power does not seem to be 80Watt.

Pre-amp part is good but power is too weak. (As a Audiofile)
1281164
Substantially less powerful than one might think.  Nice soothing "fan noise" but don't expect to notice much air movement more than a meager foot away from the device.
1725504
Not quite as powerful as I expected. But it is a good purchase.
862870
I really liked the class that I had to take this with, but the book was a little underwhelming. I feel like I got a lot more out of the concepts this book is based on and not so much out of the "practical" applications of the book. But, it is a good enough high-level overview for me to recommend it strongly.
1419007
it's much smaller than i expected, and having only previously used a big, standing steamer, it's a bit underwhelming. it takes about 5 minutes to get going, and then doesn't exactly blast steam. it's enough to help a little bit on small wrinkles in easily-steamed materials like cotton, but has a much harder time on anything thicker. it's certainly better than nothing. i got this one because it takes 110V or 220V, which is useful. it's very compact and portable, and very efficient with water.
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.
4797656
It's somewhat adequate, but not the most powerful of powered brushes I've used. It's very soft, and the motor seems to be under-powered for the size.
3269515
The good thing is that the positioning is reasonable, and the shaft can bend without too much difficulty. On the downside, it has very little holding power on a round surface. Clamping to a pipe is not the strong suite for this device.
1640098
Inspirational and unusual in the early weeks, but becomes less so with familiarity. Not as miraculous as claimed,but well worth half the price
2558927
This robo-vac is very capable and has lots of bells and whistles but it's not really a heavy weight contender against the other vacs.  I put this in an empty living room and it seems to go around the house cleaning but it doesn't do a very thorough job.  The mopping is more of a gimmick and doesn't really do much work.  Because you're supposed to clean the pad often and you can't rely on 1 pad to clean a living room.  This is mostly suitable for an apt without much clutter.  I got this cheap so it does the job and has good battery life overall but don't expect it to clean every nook and cranny and pet hair is hit or miss.  Otherwise it is capable robo-vac once it learns your room and I would position it in a corner so it starts off there and goes around the room.
3296936
This has been handy a couple of times, but I have to admit that it is a little weak. It is very useful when you have a lot of a repetitive task to perform that doesn't require a great deal of force. Otherwise...
3763723
This diffuser is nicely made, but does not scatter a lot of light. The light is still pretty direct and a little harsh especially when using higher power. I would recommend only using this with the speed lite if it is attached via hot shoe mount. I used it on a light stand and it was hardly as useful as shooting through the umbrella. Not the same as what a light sphere would do for you.