The Koko is a great upgrade from the already amazing standard Caliburn. No fire button is not a problem as the Caliburns have one of the best draw activated auto-fire functions on the market.
The new coils are very good, having two extra wick holes allows for high VG liquid, although the older pods are also OK with around 60-70% VG. Slightly warmer vape off the 1.2 Ohms, and perhaps a bit of a tighter draw. All Caliburns work well with either nic salt or freebase nicotine.
Really good device, highly recommended and very competitively priced from The Vaping Kiwi - you guys are awesome, best vape shop in NZ IMO.
Review posted by