I just got one.

The unit is very good looking and well finished - so well that I'm having my doubts using it in xc or places where it might get muddy. It looks like something to be used on the road, not on a MTB.

So far, I'm having some problems.

Firstly, the docking station that comes with, doesn't work. Non of the 3 PC's I tested it on could detect it. (After uninstalling, re-installing USB drivers, the VDO software etc etc. multimeter detects no continuety between 2 of the 3 contacts at the docking cradle, and the USB plug...) When I shake the USB plug itself, I head something loose inside...

The speed is lagging behind about 4 seconds... when I start riding, the speed is not updated until about 4 to 5 seconds later... when spinning the wheel by hand and suddenly stopping it, the last speed is displayed for about 5 seconds.... even with the wheel stopped dead... This is frustrating, because in xc, a lot happens in 5 seconds and while riding even, it takes a few moments after accellerating before the new speed is displayed. I'm baffled... Seems accurate, but I want to see my actual speed to pace myself, not the speed I did 5 seconds ago.

I also got the cadence sensor to show power output. The power measurement, it seems, is calculated using a few of the variables and this also lags behind. At 20km/h up a steep climb, the power displayed is about what I've done 50m back. So if I start an all out effort up a 200m climb, my max watts only shows about 50m further, even if I immediately accellerate to the climbing speed. When I back off to a relaxed pace over the summit... a high Watt reading is still displayed for a while... I don't know why it takes so long to make the calculations...

Like up a 16% at 12km/h from standstill, I reach 12km/h in a few metres, but only after a while (+- 50m) the watt output starts increasing in stages, like 35, 66, 120, 180, 250, 320... etc... then once at the actual... it stays there... but it makes you wonder if it's the real power output, or what you've done 50m back.... beacuse once over the summit, I can spin easlily to recover and it will still show 300+ watts for a while before coming down slowly... The power measurement is displayed last in the menu, (maybe showing that it's not that important or accurate?)

To see the Watt measurement, the right top button needs to be pressed 7 times.

The timer goes to zero after 24 hours... annoying for someone who want's to do a 24hr solo, who normally rides just longer than 24hrs...

The Altimeter works well. You can set the home altitude and can easily calibrate back to the preset home altitude before a ride... one some days, the altitude changes up to 130m at my base location (on the Z3) with weather changes.

The Cadence sensor responds fast and is good. No lagging like the speed sensor.

The HRM is also good and accurate.

The gradient seems accurate.

Temperature is accurate, but you can't log it. It only shows current temp. - no min, max avg.

The buttons requires some force to be pressed. And here comes more problems...

I'm finding it very hard to understand the logic behind the settings menu. The items I need to frequently access, are far down the menu list, which means lots of scrolling = lots of button pressing to pass lesser important settings... see below...

There's a few things a cyclist want easy access to... like to set the actual altitude, to select the HR training zone for the ride, to set the alarm, and to select the type of timer you want for the ride, or to change wheels to another wheel set.

But when entering the menu, you have to browse through things like Language, rider setup, power measurement setup, clock setup, wheel size set, service interval set, PC connect set, etc etc. things you only set once and forget about it...

So to set the actual altitude, I have to click the left button 11 times or the right button 9 times to scroll through the other settings to get there... which is hard with the buttons that need so much force to be pressed. And I race a lot so I want to set the altitude actaul for every race start.

I want to see the program menu re-organised, so that the frequently used items are 'nearer' to where the menu is entered as default. (def not language... everybody can read English, so it won't be hard to initially read English until you reach the language setting item to change to you language) It's just plain annoying when you want to change your target HR zone and arrive at the Language setting and others...

I now have to send everything back for a replacement - they suspect that my computer is faulty because of the lagging behind. I've even tried pairing the sensors in a different order. The speed stays behind...

The mountings are good (watch, stem or bar). All batteries are user replacable. I like this computer, but it will be perfect if the speed is updated instantly, and if the menu is re-organised, and if I can connect to the PC.

I'll update this once I receive my new one. I feel I had to share this, as I spent a whole day uninstalling and re-installing drivers on my PC, WIN XP Service packs etc. just to get the PC to detect the docking station, which now turns out to be a poor connection.