Adapter good, bad extension

Actually, I have the kit (DeLOCK USB Adapter 9-Piece Set) added myself to various adapters and a neatly coiled USB extension cable to have. I do not need any adapter (esp. Network / RJ45), I have taken into account.
Some of the adapters: The adapters are properly processed and 4, which I can use with my equipment, work well.
For USB extension: The extension is of poor quality, a charging equipment is only possible if they are not too demanding. One use with BlackBerry, iPod Touch and USB stick failed to charge my Bluetooth headset is available. I can only add my voice to other reviewers - the extension is not really usable, since there are better.
Conclusion: price / performance is ok, when it comes to the adapter and the tidy storage, instead of beliegenden USB extension you should also order another rather equal.