My Sigma ground to a halt last week. So I have invested in a Polar CS400.
I remembered this
THREAD and how several said they were impressed by the Polar they had. I bought the one I couldn't afford, but it was better than the next one up that I still couldn't afford
I've been using it since Thursday but only installed the cadence on Thursday night.
I need something to think about on my commute. I find it is all too easy to get 'lost' in thinking about nothing and then I'll find myself just bumbling along. In that respect alone, the cadence is ace. I can concentrate on keeping it above 80 at all times. I seem to enjoy 90 at present, but we will see.
I plan to figure out how to train with it so I can extend my commute into a proper training session, just to liven it up a bit.
Why not a 705? I already have a GPS that works fine. It is not limited to a 15 hr internal battery either.