Adapter well that problems will arise

First, I had bought an expensive adapter, but after about 12 months had the familiar cable break. I go carefully with the Apadter order, nevertheless the defect. In other reviews I became aware of these problems. Since I had to buy a new adapter, I tried it with this cheaper option. The Apdater funktonierte right away (picture and sound) to my MBP 2010/2011. Now, after three months, again the same problems; I move the adapter, then it may be that this again all the best transfers in a particular position, to a complete failure. Say again shortly before the cable break. Despite sorfältigem dealing purely in the notebook bag ran to the projector and back in the office on the second screen, this cable break can not be prevented in the long run. Although I believe that this must not happen in the frequency, but if you buy this product or the adapter by another company, it should be taken into account in anticipation.