Am considering buying either the CS or the Octa Chrono and before taking the big step was wondering if I could elicit some feedback from folks who have experienced those two watches (good or bad). In particular, am looking for specific feedback on reliability and whether those watches are good for nearly everyday use (4/5 days a week). Lastly I was also wondering how the Octa Chrono stacks up against the Lange Datograph since they are around the same price range (if its possible to compare those two watches at all!). Thanks.