I don't have the Kathoolas but i have regular crampons and yak tracks. I've never used my crampons for any hiking situations, but I always put a pair of yaktracks in my pack if the trail is a potential for snow/ice, even in the summer.
Yes they sometimes break, but it depends on how heavy you are and how you are using them. I'm a pretty light person and i've used them in multiple situations, including some rock, and they are holding up. Now i've also seen them fail on others. I've climbed Mt. Adams (12K) in WA using only yaktracks. I use them on snowy trails all the time.
Whereas weight is your primary consideration and you are not planning on doing any crazy climbing, i do recommend yaktracks. they work just fine and are very lightweight.