Yes, it is easy to use for running, as easy as the 610. Actually, speed outdoor inline skating is very similar to running excepted that you ride much faster and display speed like for cycling instead of pace.Thanks for your post. It´s easy to use for run? I know that you dont´t run, but which are the parameters that the Fenix give to runners?
You have the same list of information you can choose from (both devices have a huge list of information yiou can choose from, I found on the Fenix all those I was using on the 610 but I didn't check if they are all present) and you can define yourself how many and waht data pages you want just like on the 610. As said, some advanced features like virtual race, virtual partner and training effect do not exist while you can have the informations provided by the additional sensors (altimeter, barometer, compass) but if you don't want them, you can suppress these pages.
What is also new is that instead of having two pre-defined type of activities (running and cycling), there are many activities pre-defined on the Fenix and you can create yourself new type of activities. For each activity, you cab define yourself all the settings (display pages, used sensors...).
Besides that, since there is no touch, you must use the buttons to scroll between the pages (up and down, I was used to use the "tap" feature to move to the next page, but this works only in one direction) and there are only 3 fields maximum on the screen instead of 4 on the 610.
Another thing I didn't mention, the backligthing of the Fenix is much stronger than the one of the 610 (you can of course program it to reduce its level if you find it too high what will most probably save battery, but on the 610 the maximum is weak).
Yet another difference : the data transfer to the laptop isn't done wireless, it is done by USB while on the 610, the USB is only used for charging (there are 4 contacts for the craddle on the Fenix like on the 305 instead of the 2 = ground and power supply on the 610) and the device is delivered with an ANT+ USB dongle for data transfer. I don't think that it is a drawback, because even if it wireless on the 610, you neverthelessl need to plug a USB device = ANT+ USB dongle to your laptop.
Now wireless data transfer may come with a new SW release: it would be logical that Garmin will use the BT link for data transfer when the BT low energy specifications will be fully finalized.