The length can be adjusted, albeit from a certain level then the rope must be reduced, since the ends survive otherwise too far, but that brings a steel cable maintenance enhancements.
The synthetic rope recommended just for hard floors, including but certainly not heard a concrete / stone, it will damage the rope. I would like to see an option here is a short spiral, as with other manufacturers, which can be drawn on the rope if you want to train times in the yard or the street.
The steel cable without sheathing I leave the first professionals, untrained leads the inevitably to a painful flogging, but that then is rather immature at the own technology, not the product.
But can the future I also imagine just for outdoor use, that this is very robust.
Say KAUFEMFEHLUNG !!! Even if it a few euros are investing.
Supplement 31.12.2014: The review is based on a purchase price of 29.90.