While I can use my Iphone to track a lot of statistics, I am looking for a simple way to monitor the speed/distance info as well as heart rate and cadence. I have heard a lot about the RFLK+ (I think that is what it is) but the closest I have been to one is on Amazon.com. I did go into my LBS and they had a Bontrager 2.1 Node that came with a heart strap and for about $60 more you could buy the cadence/speed sensor and it would display them on your bike in near real time. Not sure if the IPhone will talk to them though, but the basic bike programs would still give me my ride info in terms of a map and route. I have owned a Garmin 500 (I think it was...was about 6 years ago) but not sure I want to go there again....the 810 is up around $600 with sensors right now. Is there a system that I can start putting together and build up over time? I prolly will not ever be doing a lot of statistical analysis on my rides...just want to ride and know the basics and keep in my HR zone to continue to lose weight.