I have so far used the cable twice and everything worked beautifully. I have twice transferred to the cable data from your phone to the PC without problems (Samsung Galaxy S5 and S3 mini). Both caps have fit on the two ends of the cable. So you need have no fear that this fall times of alone and lost. The cable is very light and small, so therefore ideally suited as a key ring.
I purchased the cable for 10.99 Euro here on Amazon in the CyberMondey week. For the price, the product is super. 20 euros but I would not spend on the cable.