Just got my Kardia 6l. I chose the $249 option because it included a year of KardiaCare, the online service. The app made it very easy to create an account, sync your device to your phone and take your first reading. I also saw immediately that my heart had a normal rhythm. I've seen some voice their concerns about additional services, but in my opinion, $10 a month is worth the extra level of support they get. The device is quite small so I would suggest ordering a case which is pictured on the same side as the device. I think $15 to protect my $100 investment seems logical.
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