Probably overkill, but it moves a ton of air
587910
This fan moves a ton of air even if that air isn't easy to move.  That's what it's intended to do, and it does it with a minimal amount of noise.

That being said, it may not be for you, and I'm not sure it's for me.  At full song it's damn impressive, and while pronounced, the noise isn't that displeasing, it's very audible.  I kinda expected all of this, so 5 stars plus the (air movement/noise) * displeasing audio ratio is great.

As this fan is designed to be controlled, I plugged this into my Asus 97 motherboard, and typically run this at 45% (it doesn't run any lower) where 2700rpm is 100%.  It's barely audible at this speed, and it's moving a lot of air (I use this as an exhaust fan where it should only need to run faster if intake fans fail).  Faster speeds are more audible (louder than the noises my Saint Bernard makes laying on the floor), and again it's rather loud at full speed.  I'm a little disappointed it cannot run slower, but my board can turn it off when not needed, and as I'm using this more as an added safety net (ridiculously tiny Ncase M1 itx case with i74790 and Nvidia 980), the extra oomf only comes into play in extreme cases.

That being said, I'll probably get Noctura 2000rpm fans for replacing the factory fans on my radiator.

An added bonus is that the vanes on the output side act as a crude guard.
4451429
I find this fan to move a lot of air. The fact that it is rechargeable is a plus. Over all it is a good fan.
3796133
The "Tornado" is extremely strong, running at more than double the RPMs of a regular case fan.  It is so extremely powerful that, if you run it outside of the case on a flat surface, it will pull itself forward!  I used it and found that it kept my system at a consistent, cool temperature.  However, it was too noisy for me, since the case is in the open and not underneath a desk or inside an enclosure.  I'm keeping it for a future system that needs the cooling that this can provide.  (And it's fun to show to friends)
4221876
Really, really, really loud--It sounds like a jet about to take off, it's pretty awesome. It's also something you don't want to keep on full speed. If you do not supply adequate power, it won't even start up or will experience intermittent rpm throttling.

You need a decent fan controller to quiet this beast to slightly more comfortable levels.

It fires off a column of air that is quite narrow.

Keep wires and any objects away from the fan, if you're in a tight chasis... you need some stellar cable management.

I truly believe that the fan grill is absolutely necessary if you do not want to risk losing your fingers or risk chopping your wires, especially if you haven't decided on your fan placement yet.

If you want to use this on full speed, you need a good 5" clearance on the intake end (honestly either end) if you do not want to create more noise. The fan grill should really be the only thing between this fan and the outside of your case. You shouldn't even worry about dust filters as dust will enter and leave in a push pull configuration.

I use this in a Lian Li TU100B at 40% speed and it still sounds like a vacuum.
1463099
The fan puts out a goodly amount of air, but it is no where near 'quiet'. Also, the stand legs(?) do not support it as well as might be hoped. Can be knocked over easily.
617856
Pros: Works great as a fan, high quality, moves a lot of air. Inexpensive!

BUT:
1 - It's really loud even on the lowest setting, which is like a hurricane.
2 - the way you turn it on is by rotating a knob on the back. It's hard to remember which way is on and which way is off, too, since there's no indication (you should write it on with a sharpie). Also, every time you turn it on, you'll also adjust it slightly, and probably also bump into the "oscillate" switch, which brings us to:
3 - the oscillate switch is incredibly easy to bump into, and then the fan moves around annoyingly.

Can't really recommend it, but it definitely moves a lot of air!
2917288
Moves air greatly with H to L switch, its kinda loud but the rig i put it in was already load so barely heard it at H.
2602452
Unbelievable amount of air flow, love that can run it even if plug in with usb
1032311
This thing can move lots of air! I take my kids for swim competitions every weekend during the summer in the hot humid VA weather. This think keeps cool when there is no air movement around us. I had to bring an extra battery to make it through the events on mid-low setting (variable knob, not the 1-2-3 switch). Only con is that it noise especially on high.
426437
Works great and moves a lot of air. Is much quieter on low but moves an unbelievable amount of air on high
2064777
This fan is noisy, huge and is suitable for a large area. I would have sent it back except I didn't want to pay the postage. It does, however, have quite a "blow".
4471459
Moves a lot of air, I mounted it upside down under a cabinet in the galley.
4167689
It delivers so much air the computer cant compensate. Kept getting bank 1 and 2 running lean. Checked with local tune shop was running 25 to 35 % lean. Went back to factory air box fixed all issues.
3362892
this fan blows like a hurricane.  Unfortunately there really isn't any low speed here.  The three levels are gale force, wind tunnel and hurricane. If you want to move air though this baby works like a champ.  In a small room it would over power you.....could be why they cll it industrial grade......hmm
2071307
Moves  a lot of air, not too noisy be careful with the fan blades you might get hurt while turning!!!
4511718
It really pushes a lot of air at you and is very well built and will last for years, but a tad to noisy for me when working. If you need a fan that is as effective as this fan, I recommend the Vornado Zippi Personal Fan. It is open with no protection from the "fan blades", but they are made of a soft skin like material and will not hurt you a bit if you happen to get in touch with by accident. These Westpointe Fans are perfect for dragging out heat from electronics like servers placed in a closed environment in another unused room.
1414227
It moves air for sure, it was smaller than I was expecting (oversight in my mind) but it really moves some air!  I have it hooked up to a carbon scrubber for removing chemicals in mobile situations like my 5th wheel (I have chemical sensitivity issues) and I think it will do a fine job of this.  It makes noise keep in mind, slightly higher pitch, I don't mind this but be aware that you won't be talking over it if it's running right next to you.