A great walk. My friend and I decided against hiring a guide as we were advised by locals that the track was well-marked and that you can't get lost. We did it North to South and it took exactly three hours start to finish. A lot of it is almost vertical and you need to pull yourself up with tree roots and branches and it seems steeper on the way down but there are ropes for descending the harder parts. There are a few river crossings on the way down (South side) so wear shoes that can take it or be prepared to take them off - the river rocks are super slippery. I forgot to have breakfast prior but ate a Whittakers Peanut Slab near the beginning which gave me a real boost! Would definitely do this walk again and it's inspired me to walk more at home in New Zealand.