Well I've been using the bike regularly for past year and it's still going strong. I've not used it every day as I originally intended but it's certainly covered a lot of miles. I'd estimate somewhere in the region of 5000 (I'll check the on board computer on Monday).
The battery still holds up and allows me to cover the 23 miles each way on 'power' setting without a hitch. Occasionally on a day with a strong headwind it goes into protection mode on the very last mile of my route home (which is slightly uphill overall) but that's really no big deal for me and can be avoided by riding a bit more conservatively.
The ride takes me 1 hour 25 minutes each way at a comfortable effort level, exactly as I'd hoped i.e. I don't arrive at work drenched in sweat and the fatigue doesn't do me in by the time it gets to Friday each week. For reference the route is 23 miles, 19 of which are off road, I'm in good shape, weigh close to 100Kg and carry 2 panniers of kit.
I de-restricted the bike to 23mph when I first purchased it (yes yes naughty me) but after a while I reduced that to 18mph with barely any effect on my time and with slightly improved battery usage. The only real difference I noticed was a reduction in the acceleration of the motor from standing or at low speed, which I actually prefer anyway as it makes the bike handle better.
I have had a handful of issues. Firstly the crappy Kenda rear tyre blew out within 2 weeks of me having it. This was swiftly replaced with a Schwalbe marathon plus tyre and slime inner tube and with regular air tops ups and I've had no issues since. The back wheel is a bit of a nightmare to remove compared to a regular bike so I'd definitely recommenced doing the same. I had to replace the rear shifter cable and it's casing after discovering that it had frayed to pieces due to awful routing under the bottom bracket. Nothing a few zip ties couldn't fix once I'd fitted the new cable though but something to look out for. I've also had an issue with the rear brake getting air in the hydraulics from somewhere. I've had to burp it a handful of times after it going soft over time. I may need to take it into a bike shop to have it looked at by someone who knows more about hydraulic brake systems than myself at some point but the last burp seems to have done the trick. Other than those few smalls issues, a broken chain and chain guard which were my own stupid fault it's been great.
All in all, I thoroughly recommend the Oxygen as an off-road capable commuter bike or for light mountain biking use
Money well spent even on cold dark January mornings like these.
