I ordered the Intermediate Bundle as it contained everything I needed for my first ultra including all the mandatory kit. What can I say, other than the kit performed flawlessly! The Kinder 10L race vest was the perfect size to carry all the mandatory kit with room to spare. I was able to keep an array of bars and gels easily accessible to keep me fuelled throughout the race without having to reach into the main compartment. I also ordered the Catbells running poles and I'm so glad I did, they are lightweight, easy to set up and collapse on the go and helped enormously on the uphills. Having never run with poles before I'm thoroughly sold on their benefits. As a system, the Harrier kit performed brilliantly and each element complimented the other perfectly. On top of that add in speedy delivery, great product and training guides, and brilliant customer service. Couldn't recommend Harrier Trail Running highly enough.