your right but their new low end portable phone is recent and has a very attractive price point, some fantastic features and decent plans.
I was seriously looking at it. I think one issue for me was that you had to have a clear line of sight with the horizon and I think you have to be outside when using it. Several people on THT have them and there was a comparison to some of the others. I can't recall but there were some issues. Frankly, as long as it works all the time, and has a reasonable plan or prepaid, then it is fine buy me.
Accessories for all these things (all brands) are expensive. For example if you want a charging cradle with a roof top antenna (so you don't have to stand outside in bad weather to us it) can be very costly. in some cases more than the phone itself
Inmarsat IsatPhone Pro - Deluxe Package
I found this interesting review of the inmarsat
http://www.survivalblog.com/2011/04/..._inmarsat.html