I purchased the t1c only because I couldn't get my hands on a Polar HRM at the time and I've regretted it since opening the package. On my very first workout, my t1c failed. I could not get it to read my heart rate after about a minute into my workout. After stopping, readjusting the belt, reapplying moisture and restarting the training mode on the wristop unit, it still failed to work reliably.
While it looks nice on your wrist, the T1c has amounted to nothing but frustration for me. It links with the transmitter belt intermittently at best and reads inaccurately when I've needed it most. On top of all this, the unit IS NOT user-friendly. Navigating through the menus to review your training/workout results demands, in my opinion, an engineering degree of some variety.
Not a good product. I'm giving up on this thing and I'm now shopping for a Polar HRM.