Fantastic product, available from Lidl's. It's really easy to set up, and picks up your heart beat without any fuss as soon as you put the band on. Time will tell whether it is anywhere near as comfortable or reliable as Polar HRM kit, but the Crivit monitor should definitely compare favourably to the Cateye and Cardiosport HRM competition.
One month on... my first impressions: Generally the monitor performs very well, with a comfortable transmitter belt and good reception on the wrist-watch. However, when I start out on a ride and my heart rate lifts to 150-odd BPM, the monitor instantly starts beeping at me because it thinks my heart rate is over 190BPM! My heart rate only reaches this high on prolonged, extreme exertion, certainly not at the start of a leisurely ride. Not sure what to make of this, but it does settle down after five minutes or so.
Another small niggle is the feeble metal buckle on the watch strap; the arm swings around quite freely and when you're trying to tighten the buckle it easily slips the wrong side of the retaining plate, which means you have to take the strap out and start again. It's really trivial, but irksome nonetheless.
Over a year on... how has it lasted? I haven't used the HRM very much, as I haven't been riding much competitive or endurance events. However, having just worn it on a 10-mile time trial I can say that it performs exactly the same as the first time I used it. The monitor still has the annoying problem of 'flipping out' at high exertion, and I think that its reading of 180 beats per minute for most of my ride was just too high.
Two years on... the watch has died, and a fresh battery isn't enough to make the buttons work effectively. Despite two years at a low workload, my Crivit heart monitor is no more.
For the benefit of people who need the manual, I've scanned the English version in and you can download it as a PDF. The quality's not great, but it may be better than nothing. You can also find a bunch of manuals on the inter-quartz.de website.