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Pros: These were on a huge sale at Newegg when I bought them. I had a horizontally mounted fan go out in my NAS, and with the sale price, I figured even if these didn't work at all, it was no big deal, so I'd give them a shot. I'm glad I did! They are quite quiet, move a moderate amount of air given the low RPMs, and I can't complain. Would buy again in any spot where a very high performance is not crucial.
So far, they're working well mounted horizontally. If you turn the fan on, outside of a case, and move it to various orientations while it's on, there appears to be no orientation that causes any particular vibration of noise that concerns me.
Seems like a well made, cheaper, fan. The fluid bearing is doing a good job.
Cons: They're quiet, but to my thinking, they're not as quiet as advertised. 14dBA (an obscenely low noise level) is the claim. I have a good handle on what 14dBA should sound like, and this seems like more. But not much more. Both fans together, operating in your box, will be audible in the room at full RPM. They're quite quiet, but to me, the 14dBA claim seems a bit optimistic.
It's so hard to get a grip on how much CFM is really flowing, because in this regard, the way one fan moves air can feel so much different than another, but I am pretty sure a scientific analysis of the CFM would show that this fan moves somewhat less air than claimed.
Other Thoughts: Your mileage may vary. My two fans were different. Physically different. Both were green, but in one, the central hub had a wider radius than the other by about 5mm, meaning the blades were somewhat shorter, presumably. AND, furthermore, the sleeving on the cables were different. One had a nice, loose, black meshy sleeve. The other had a more rigid, thick, (black) hose-like sheath. Either way, they were "sleeved". But the two fans only had two common points: Green blades, and the outer housing was the same. Definitely the moving parts were different, and the sleeving was different. The box inside the 2-for-1 package even looked different, even though it showed the same SKU. Weird.
Air flow and noise level seemed comparable between the two.
For the price I paid, I am satisfied, assuming they last for a reasonable lifetime. But at full price, I'd have not been as happy--barely adequate at the full price.
As I said above, the claims about the CFM and ambient noise level seem just a shade optimistic. The fan is slightly noisier than I expected (though it is still most certainly "quiet"), and, I think, probably moves somewhat less air than claimed.
As others have said, the fan really only mounts in the exhaust (blowing "out") configuration, because only the one side receives the screws. Seems like a preposterous thing--I wonder what the heck reason they had for that.
This review is from: RAVPower PB07 10400 mAh White External Battery Pack Portable Charger Power Bank (Dual USB Outputs, Ultra Compact Design), for iPhone, iPad, Mini; Samsung Galaxy, Note 3; HTC One, EVO; Google Nexus
Pros: Spectacular. I drove from Baltimore to Pittsburgh, had my phone on GPS navigation the whole way, plugged into this thing, and showed up in Pittsburgh WITH ALL THE LIGHTS ON THE BATTERY PACK still showing charged. It was only after like 12 hours of use (Samsung Galaxy S3) that I was done to (G_d forbid) 3 bars of power. PLENTY of juice.
Cons: Nothing really. I mean, it's big, it's a lot heavier than a typical smartphone. But, you know, it is what it is. It's a big battery.
Other Thoughts: buy buy buy buyREAD FULL REVIEW
This review is from: POWEREX MH-C9000 Charger - Analyzer
Pros: I have never owned such a nice, feature-packed, battery charger in all my life.
Cons: None that I can see...so far.
Other Thoughts: This thing is BIG. I mean it is BIG. I didn't think to check the dimensions when I bought it, and just assumed it was similar in size to my old Maha/Powerex charger that I bought about 7 or 8 years ago. Well let me tell you---I was wrong. I went from something the size of a calculator, to something the size of a cantaloupe.
I think it's literally too big to travel with easily.
So just be aware of that. It's a feature-rich, awesome, charger, though.