Worth the extra money for a high quality rope that will probably last longer than me.
This tricep rope is absolutely great. The differences that you should be looking for from a cheaper alternative are:
1. The metal connector that hooks into your system is curved. This means that, over time, the metal won't be digging into the rope and cutting through it. Other cheaper (and some not) options have basically a much shorter straight pipe there that will cause the rope to wear out.
2. The rope ends swivel. No more rubbing my hands raw as the rope twists in my grip. A small thing but it's so nice.
I like the 36" length of this rope. It's 6 inches longer on each side than a 24" would be, and it feels like my hands/arms are in a more natural position as I reach the bottom of the pull. I am 6 feet tall, so a shorter person may not like it.