I haven't pulled the trigger yet. I'm using a Sigma BC 12.12 (wired), because my limited experience with wireless is mixed. With a cheap Axiom wireless 'puter (from Performance) and with my phone using Polar's app and Bike Computer (IIRC), I got different readings for the same ride on wireless and essentially the same readings wired. The wireless showed up to 1.5 miles shorter than the wired.

I think a speed sensor would make the distances consistent and correct, but I'm not sure.

I suggest Bryton because I understand their documentation better than IGPS's. I just can't figure out the differences between the various IGPS models.

IOW, I have no idea whether Bryton is better or worse than IGPS As far as I can see, once we get away from Garmin and Wahoo, it' hard to find reliable info, and we just have to make our best guess and hope we get an instance of a product that works.

What really bugs me is that IGPS sensors look a lot like copies of Garmin's ... which makes me wonder if IGPS is actually Garmin's supplier.