They didn't give me existential happiness or a friendlier disposition but they provided adequate humidity ...
924528
I used these clay balls to hydrate a fruiting chamber for mushrooms and had success. They didn't give me existential happiness or a friendlier disposition but they provided adequate humidity for my shrooms and that's all I ever wanted them to do.
3824913
They're fine, and do the job... But they're not awesome quality nor really exciting. I'd give them a 3.5
3574931
They felt very cheaply made, didn't feel they were a quality product.
365997
Not very quite but it serves its purpose to humidify the room.
3787545
While it helps a bit, not as much as I would have liked.
4382199
I don't know if I just got a defective pair or that's the way they're supposed to be, but there was a constant low grade buzzing when they were turned on.  It persisted both when something was playing on them and when they should have been silent.  The stuff that played on them sounded kind of thin and watery compared to the sound coming out of other headphones I've tried.  The ear cuffs themselves were fairly comfortable, but the pressure from them was a bit too much.  I have a small head and it still felt pretty tight and like I'd get a headache from the pressure if I tried to wear them for several hours (like I'd have to for a raid)
990831
Err...  No revelations, but I suppose this can bring the optimist out in you.
3524424
They're just meh, not good but not horrible.  They don't irritate my skin or eyes, so that's something.
3465527
I was worried when I first got them because of how deflated they were, but that didn't take long to resolve itself.
2608163
My basement was not quite so damp as to render the two of these I bought ineffective in two days.  Unless high capacity means negligible effect.
2522603
I expected them to be easier to empty, if anything they were harder to empty. I have arthritis and my hands don't have much strength.
4066406
They served the purpouse of replacing my old sheets, but they are not anything to get excited about when you go to bed
1375258
The ride up a little bit, and they don't breathe as well as you'd hope. Maybe someone else will have a better opinion but this is the case for me. My nuts feel a little to hugged by these sometimes.
3704079
Not as polished as the high priced units, but worked for me.
4901260
I gave 3 stars because I feel that I was only given colors that no one wants.
1221992
I bought these to cut down on moisture in some small sealed plastic boxes used in marine environments. They did decrease the humidity by a few % but nothing better than some dry paper towels would have done and nowhere near as well as a dedicated moisture wicking product like damp-rid.

As far as odor control goes I didn't buy or use them for that purpose but if I had to comment I'd say that they didn't get rid of the plastic/enclosed space smell at all. That doesn't surprise me because for these to work at all there has to be air moving around. These bags are essentially air filters except they come with no means of pushing air through them depending solely on natural air movement through the area or external fans.

Negatives aside I'm going to keep using this product instead of returning it. It got 3 stars because it DID decrease the humidity and it technically should work as an odor absorbor, it just doesn't do either of those things particularly well. Of course it also doesn't use power, is reasonably small, and for some uses that's exactly what you need.
1329729
They were just okay. Did not taste fresh go me.