Great USB port, but its for CHARGING, not data transfer
352892
Great charging port, and I like that it's flat with a low-profile, so its easy to place in the office.  My only complaint is I purchased it under the impression that I would be able to connect it to a computer, but it's simply a power hub, not for transferring data.  That's my own fault though, I don't think I read the product description carefully enough (late night purchase).  Still, its a good enough product that I'll be keeping it and putting it to good use.
4468440
I don't think that most people writing these reviews realize that you need the wall adapter for it to charge. The thing that the USB plugs into and plugs into the wall. But I heard you can charge it if the device is all the way turned off and plugged into your computer, but I'm not sure. But otherwise, you need the adapter for it to charge. I just ordered this and once I receive it I will change my rating and say if it does work or not. But anyone who reads this, remember, YOU NEED THE WALL ADAPTER! Or it will only work for transferring data.
4399076
Works Great, but covers USB port next to it on the Macbook Air.
2540261
Great all port work great, make sure you have a wire that can support that current of power. because some wires cant and will charge very slowly with whatever chagrer you put them with. but the only flas is the extra space on top of the 4 usbs seemed unnecessary and fixable.
234198
This device works well and as advertised without issue. I believe all the other reviews here cover the functionality well so I won't get into that, it does what it says, and does so well.

My issue is the USB port for charging. I hooked up a micro usb cable to my phone and into this device so my phone can charge at the same time. My car port is the type that turns off when the car is off, so the device also powers off.

The first time I hooked my phone up to charge, and got to work, I left my phone in the car. It had full battery. I forgot it in the car, hooked up to the charger. When I came back an hour later, my phone was dead. I thought it was odd but just charged it again and all was fine. i usually take my phone with me when I get out of the car, but I noticed the next time I turned the car off, my stereo was still on, which I found odd since it shuts off with the car as well. I also noticed the belkin disk was still lit up, as though it had power, which again was odd.

After some research, I found that plugging and unplugging my phone from the USB port provided power to the stereo and belkin, meaning it was pulling power from my phone to power itself, and anything else wired on the same circuit as the cigarette lighter socket (such as the stereo.) It appears there is no diodes or backfeed preventative mechanisms built into this device, which can be damage your phone (or whatever you plug into it) as well as other electronics in your car. Based on this, I DO NOT recommend using the USB port.
4820123
Do you need USB 3?  I thought I did, but now I'm not sure.  difficult for me to measure transfer rate vs. 2.0
1172201
This did exactly what I wanted it to - allowed me to charge all my devices with the same cable while traveling out of the country and even worked with my extra battery pack.  As mentioned by other reviewers - and the only reason I can't give it 5 stars - this adapter will only allow you to power or charge your device, it won't support data transfer so I still need to keep track of my Samsung cable for that or I'll end up spending far more time ejecting and remounting my micro sd card than I want to. If they ever make a fully functional adapter, I would be first in line.  Also as noted this does stick out a bit from my tablet, but I've had no problem closing the cover of my case around it.
563075
Works great for charging, fast charges Samsung Galaxy and Note phones but cannot be used for data transfer when connected to the computer. Other than that, solidly built and recommended!
4293492
This dock has one flaw that kind of bothers me. Even when it is connected to the AC adapter, it will not charge my iPhone unless it is connected to my Mac. This is kind of annoying. I thought I could use this dock as a charger since it had an AC adapter (unlike the Apple dock), but its just not possible.l I just noticed that it says so clearly on the griffin support webpage for this product. I guess it was my fault for not reading their support page first. Anyways, the fact that it's a USB hub and that it can load CF and SD cards is great, it saves me a lot of desk space and means I only have one cable plugged into my Macbook. I just wish it could work as a charger when my Mac was in another room.
3166735
I have it connected to a 4-port USB hub and keep a 32GB SD card inserted. I use it as one of my 3 local data backups. Works as expected, no problems, very pleased.
3671936
I like how much space it has, works with most, but not all the regular computer USB ports, but i like it
747473
The 10ft cable is nice when charging your phone or other devices so you don't have to stay pinned to the wall, and it works great for charging. I don't know why some other reviewers would buy as a data transfer cable because there would be too much resistance and pinging would take long making transfers slow. Use as a charging cable because that keeps it powered the whole time with no delay (takes no longer than any other cable.)

If you want a data transfer cable, this is not the product for you, perhaps a 1 foot cable will do for those needs.
351767
its not a standard size so it sits a bit in on the front of my case (picture for reference). also the seventh port that dose the 2.1A charging dose not connect to the PC it only charges and none of my device get a 2.1A fast charge from it. but if i had the slot on my motherboard for another usb3.0 i would get another.
1743300
Not to be used as a continuously connected USB drive (for like daily backup).  I often have to power cycle it, like weekly.
1875220
This seems to be mainly sold as a fast-charge adapter, but don't overlook the fact that it does not connect the data-lines!  With some pretty major and unrepairable flaws located in USB opening it up to some hard to block exploits, people need to be cautious when using publicly accessible USB ports.  I travel a lot and was horrified to find that most of the USB charging ports on airplanes also provide some kind of data interface (the phone thinks it's been plugged into a computer).  This is a HUGE security concern that most people outside the corporate security world does not recognize.

This device acts as a condom for your USB devices.  If you're going to plug into a publicly accessible or otherwise possibly compromised USB port for charging, this device will protect you!

What I like:
It's small, simple, and just works.  In addition to helping some devices charge faster, it also blocks all data!

What you should know:
There are a lot of reviews stating that this does not lead to faster charge times.  Be aware that cheap USB cables use lower cost wires which can limit charging, and some devices simply don't charge above a certain rate.  I've had really good luck with Anker's premium USB cables, but just look for a cable with 21AWG or better (smaller number = bigger (better)) wires.

What could be better:
Nothing, it just works!
4330571
Working perfect, great for backup and transfers, is not as fast via USB though.
107277
Ok, I am amending my previous review.  I had the dock plugged into a usb card on my computer.  Not sure why, but it didn't like being plugged in that way.  Most of my other peripherals don't seem to mind.  Plugged this into a motherboard usb and it seems to work better.  I'll change the review later if it keeps going.