USB ports are low power--no SuperDrive, no iPad charging
921299
The hub is powered by its own supply. An inexcusable design choice at this high price.  Otherwise this meets my needs.
1373144
The outlet works good but the USB ports do not work. I would not recommend this product.
3367555
Does not work with Apple USB cable or iPhone , give either "device incompatible or power exceed limit" on the MB head unit.
2853622
Worked, but would not power the output ports while the power bank was charging
4869759
This is a great little, travel-suitable charger/outlet strip. However, it only provides 2.5W of output on the USB outlets, which is far less than the 10W required by iPads. (I believe it will charge iPads, but only very slowly.) Therefore, you need to use your iPad's charger, which takes away one AC outlet and sort of defeats the purpose.

Other than that, I'd recommend this.

(FYI, to calculate the USB output, multiple the rated 5V x 500mA (0.5A) to get 2.5W.)
2970305
Despite being a powered hub, I can't really use any powered device on it. Doesn't work with small external hard drive, cd drive, iPad charging, etc. All these items work fine with the other brand I ended up buying.
3532918
Pros: Huge capacity
Cons: one of the charging ports stopped working after one day
2177150
I got this because other powered hubs did not work with my iPad Mini - to the extent that the device was not recognized at all on my iMac.  With this hub, my iPad Mini Retina is recognized, and does charge, though very slowly.  Mac OSX pops up a message saying that the device is not charging.  I charge the device using standard chargers, so that was not my major criteria - the device is recognized now and can be updated or backed up from iTunes.  Just don't expect to get fast charging out of this device.
2549654
Inexpensive, but it does not power external USB 3.0 devices like external hard drives.
3528504
Should have stated that if used with a Mac, USB must be inserted in the Mac; can't use a powered external port.
4002545
I connect my
a) plug-gable video adapter for the monitor.
b) one wired keyboard,
c)one wired mouse
d) one hard disk.
e) One wifi dongle for the logitech wifi keyboard k400.
f) Occasionally I as well charge my RC helicopter on it.

Pros:
1) For the above set of devices plugged in, it does not necessitate for me to plug the hub to the power socket. The laptop power seems to be sufficient.
2) The two usb sockets that can be set at an inclination, is a thoughtful design.

Cons:
1) I am not able to charge my iPhone on it even when I plug the hub to an external power supply. Weird! Not a deal breaker.

2) The hub does not have a on/off switch. I don't want it to sit their sucking power even when i switch of the laptop. Especially with all time on blue lights. So right now i have to pull out the power plug off  every-time i put my laptop to sleep.

Update Feb 9th 2012 - MAIL FROM SELLER, FYI:
---------------------------------------------
The Plugable USB 2.0 10 Port Hub is a standard USB 2.0 Hub and not a device charging station. The primary function of a standard USB 2.0 Hub is to provide an option to connect multiple USB 2.0 devices to an upstream computer through a single inbuilt USB port on the system. It is not a product intended to charge any devices and will only provide up to 500mA of power to downstream devices (to be able to power up and communicate with the computer) when an upstream computer is connected and on. In other words, it is not the right product for your need.

Like all standard USB 2.0 Hubs it does not support proprietary charging of Apple iPhone/iPod/iPad devices at non-standard rates. What this means is that it does not have special support for Apple proprietary charging, beyond the 500mA rate which is standard for USB 2.0. This means iPads will only trickle charge, and only when the iPad is turned off (if turned on, the iPad will report "Not Charging"). For iPods, iPhones, and other devices, it will charge only at the standard 500mA rate.

Apple has their own pseudo-extensions to charge their devices like the iPad at higher amperage (2.1A). This hub (or any standard USB 2.0 hub) is intended to be used to plug in standard USB 2.0 devices. These devices do not expect to receive more that 500mA of USB bus power. Providing higher amperage of power is against USB 2.0 specifications since it could damage the connected devices.
594415
I really wanted to give the more stars, but the fact that it's a POWERED hub that cannot supply enough power to run 4 hard drives kills it.

I have four western digital 4tb 2.5" usb 3.0 external hard drives. When I connect three of them, everything works fine. When I plug in the fourth, one drive will start clicking as if it's not getting enough power. This is using the supplied power adapter plugged directly into AC power. I also tried a different USB power adapter just to rune that out. Still not enough power. Ugh.
2298361
One needs to be aware that one of the USB ports will not charge an iPad.  Both will charge iPhones.
4795397
Does not allow for direct "porting" of a connected USB Device.  Each Device must be selected individually, and cannot be shared as intended.
262724
I own an Apple Powerbook and was surprised when the drive would not work with it.  I contacted Western Digital and they worked with me to identify the problem and send me a special cord that plugged into two USB ports instead of one.  Evidently, the problem was that the drive wasn't getting enough power.  It now works fine.
3946518
Purchased in advance for a boat application.  When finally plugged it in everything worked but USB ports which is really what it is all about.  Voltage display and indicator light over USB ports illuminates but no power on any of the four ports. Too late to send back.
602859
Returning mine today. WD took over a week to send the booster cable, and that didn't work any better. I can only assume the drive is defective, since the USB ports are working with other devices. Don't know if this is an iMac thing or not, but I need this for archiving and cannot consider it reliable.
===
Just received this drive and could not install it. Turns out that the power required is more than my older iMac puts out. Customer service at WD promptly offered to send a power boost cable (gratis), which apparently is a two-headed USB cable, that is, take up two USB ports on the iMac. Luckily I have two available. Otherwise I would have to get a power USB hub -- or return it and buy an external desktop HD.

Just a warning to other users of older computers. The WD site itself mentions some computers may need a booster cable and offers a part number, but doesn't actually sell one as far as I can tell.