I have had the Bontrager Node 2 for almost a year. It has been very reliable. It comes with a HRM strap and you add a speed or cadence sensor to fit your bike. Since it is ANT+ you can use other sensors if you choose. I used a Garmin combined speed/cadence sensor for a while. It will also read power meters that output ANT+. I have ~4K miles on mine and just replaced the battery. If you do not require down-loadable data nor GPS this is the best bang for your buck.