On December 10, 2014 I ordered the sliders, I wanted to give Christmas Eve. After several days the camera rail finally arrived. When I took the article from the simple carrying case, I could not believe my eyes. The article was no longer new, but he was scratched everywhere. It is difficult to understand for me that you let a slider, which can be ordered as new come, which not only has signs of wear, but has been used safely over a longer period. In addition to scratches and dents, the screws were installed wrong. I contacted the seller directly by e-mail. But I was only after two days (evening mind you) an answer when I called Amazon. Apparently knew the provider's Grading decision, because I was an Exchange, a rescission or Teilrückerstattuung totaling 15.00 Eur offered. I asked for an exchange and mailed the items directly the next morning. And so time passed until today, the January 6, 2015 !! I finally got the new parquet. This silver also has several deep scratches on aluminum. Too bad that I my godchild two weeks after Christmas a "new article" grant, which has several scratches. Were it not for the scratches, the price-performance ratio would agree, because the camera does not wobble drive and the track is very sturdy.