I live in Kelowna BC and have been using my Kahuna for about a month now.
The bike allows me to go up any hill usually around 20km/h, going down usually about 50. It has adequate braking power.
I am a pretty aggressive and rough rider. The bike has got me riding again and is lots of fun. I bought it at the store in Kelowna and John was great to deal with.
The Kahuna takes me where I want to go without hesitation. I can ride my bike with confidence and then compliment that with the front and rear suspension.
Synergy Kahuna is best bike on the market hands down. You can pay more if you like but the Kahuna is all you need. I have more fun on this bike in the trails then I do with my twice as much mountain bike.