The price is also insane nowadays though. IMO they are very vulnerable to the likes of Coros, who also have MIP watches that last for weeks, have much faster mapping and are less than half the price.
I haven't compared it with a heart rate band yet. GPS accuracy is good since I enabled dual-frequency (MAX), before I had some inaccuracy in (urban) canyons.
How's the accuracy on the Coros watches?