I own a TomTom HR strap however it cuts into my chest, so I wanted to buy a wrist / arm HR strap. So, I bought a Scosche Rhythym+ after reading reports that they worked with the original TomTom Runner, however this wasn't the case. Apparently firmware changes since then had made them incompatible. Luckily I had a friend who bought the band off me.
So, can anyone confirm an armstrap HR band which works with the current firmware of the original TomTom Runner?