anyone ever use one of these in the Sierra?

http://www.mackaysatellite.com/inmarsat-isatphone-pro-satellite-phone-promo.html

I'm pretty close to pulling the trigger after reading a lot of reviews and tests. Seems to be much better suited for the Sierra than Iridium, more durable, double the battery life, half price... I guess I will be one of the first testing it in the Sierra if nobody else has done so yet. Their rate plans are also much more along the lines my random use over the year would require.

more info
http://www.inmarsat.com/Services/Land/IsatPhone/SatellitePhoneComparisonStudy.pdf

I'm so glad somebody outbid me on an Iridium on ebay last week - had no idea this phone was on the market, at half the price of a used Iridium 9555