I read on the K1 for almost 2 years before getting the K2. the BIGGEST difference for me is the battery life. PHENOMENAL!!!!! (and I had 2 K1s so I don't think it was a particular bug). I wish it were just a little thicker for hand comfort, but not having the hard corner in my palm makes a big difference.
until there is some sort of an implant in my skull I just don't know what else I could lust after. little things, sure... but WAY happy with what I have
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