Great Dive Computer for the outdoorsman/fitness buff
I upgraded from the mk1 to the mk2i to be able to pair with the t1 since I'm putting together a travel scuba kit. I wear it almost 24/7. Was better screen and software than the mk1. You do give a hair of battery life for it but it lasts about 7-10 days when using all day HR and using for workouts. Highly recommend getting chest hrm if you use when lifting.