Main things I didn't like about the 610 were the sponginess of the buttons - particularly annoying miss-hitting lap button when doing intervals - and the strap, from which I lost the little metal pin and ended up making a duct tape repair for most of its life. Feels heavy for the size as well. Much prefer the 220.
Main things I didn't like about the 610 were the sponginess of the buttons - particularly annoying miss-hitting lap button when doing intervals - and the strap, from which I lost the little metal pin and ended up making a duct tape repair for most of its life. Feels heavy for the size as well. Much prefer the 220.