The first two days are quite demanding. We have spaced out the first control on the third day to be time-limit friendly.
If you would like to use a phone as backup to GPS, I recommend joining our RideWithGPS club where you will be able to get offline maps and other "premium" features when riding on routes organised by Kiwi Randonneurs.
Kiwi Randonneurs RideWithGPS Club with join code
Following final tweaks to the route, there is now just 1.8km of hardpack, which is in better condition than some of the sealed roads. The rest is sealed, but much on the eastern side of the route is large stones in the chipseal, so I still recommend 28-32mm tyres.
Days 1 & 2 are tough. Day 3 has some of the fastest parts of the route.
Day 4 is the taper off.