I've been using my Swytch Eco equipped bike for about 6 months now. It can handle my 18km - fairly hilly - daily ride twice before needing a recharge. Now the ride takes me only 45 minutes, rather than an hour, and really takes the edge off the steeper climbs. And I find I do the ride more often than before I got the Swytch kit, because it's more fun and less slog. The kit was pretty easy to fit. The only problem I had was that I found I had no space on my handlebars to fit the thumb throttle I had ordered. Swytch's customer support refunded the cost with no problems when I sent it back.