Would like a bit of feedback on this unit. Have read some comments on here but would like a bit more info.

1) How many heart rate zones can you track and record?
2) Anyone experience interference or loss of signals, either HR or bike functions, on more than just a very occasional occurrence?
3) I read the cadence functions were not graphable...but can you get your average and max at the end of the ride?
4) Would you say the HR monitor is accurate as compared to a good Polar unit?
5) What specific problems have you had with this unit?

Thanks all,
John Marrocco