Usb connector not properly renforced
580741
All it took was a slight movement of the computer tower while I was connecting the flash drive and it bent right from the rubber housing. Upon further inspection I found nothing but solder was given the responsibility to protect my valuable data.

A poor show of design flaws an otherwise promising tool.
831074
After a couple months of usage one port failed and another developed intermittent contacts where USB drive inserted would not mount unless it was jiggled. Also I think most people would find the very short USB connecting cable to be a problem.
1466429
The USB plugin fell apart when I pulled it out of the port.
2165632
Loses connection to USB cables if connector is inserted completely into charger. Have to pull back about an eighth of an inch.
626503
Works as designed, but the USB connector is tiny and difficult to remove from laptop - it's flush against edge.
2124383
The driver could use some work.  I found that the PC would sometimes loose access to the USB 3 devices plugged into it.
4766433
It works okay but after about two weeks the usb cord is slightly loose and my computer has occasional trouble recognizing it.  Have to unplug and replug to get it to work again.
4726080
Some computers won't recognize this and furthermore, some devices won't work when plugged into it.  :-/
2785570
The end to plug your USB cord is a really tight fit, you have to really push it in but it works!
2748976
One of the USB ports broke off from the cable immediately upon first use. The other cables have worked so far
3278823
The connect did not match up where I had to modidify it to work.
2197002
I plug the $8.49 USB card reader into my beautiful Thinkpad.  Some part of the USB connector of this card reader is poorly finished and it doesn't plug in cleanly, as you've come to expect from most USB connectors.  So I plug it in and nothing happens.  I plug in a different USB device and nothing happens.  In fact *none* of my USB ports work any more.

Step 1: Working laptop.
Step 2: Plug in poorly built Cellet card reader.
Step 3: Broken laptop.

Can I say, conclusively, that there is a definite causal relationship?  No.  I can say, conclusively, that I'm not plugging in the Cellet (or the other Cellet reader I bought, which is also kind of rough around the edges -- literally) into any other expensive computers?  Yes.

Update:  I was looking at the USB connector and noticed little black plastic flakes, presumably where it scraped the laptop's USB circuit board.  Sucky.
1653149
only two of the items work well  the usb cable by itself does not fit well on my bb passport
1461614
the micro usb side is made of plastic "snap on" type. the plastic lock broke and is now functioning weird. did a ghetto fix by placing a tape around but just does not function as it should.
411792
When it's plugged in sometimes I lose things plugged into my other usb ports. If I unplug this dongle the other usb items work :(
1306084
To get this working again, I had to go through the Device Manager within the Control Panel > All Control Panel Items. If you right click on Mice and other pointing devices > HID-compliant mouse and then click on Properties, you will need to go to the Driver tab, click "Uninstall", verify, and then re-insert the USB dongle at that point. This is what worked for me.
1659335
after using twice the micro usb adapter dongle fell off and got lost. so now i have a nice lighting charging cable, but that's not why i purchased this item, so i am disappointed with the end result.