I'm looking for the current thought on these units.

I'm thinking of picking one of these devices up primarily for use in an emergency (hoping I'd never need it) but being realistic and knowing where we all go is often far from quick help if you need it.

I've had some minor experience using a SPOT (someone else's) years ago, but it seemed pretty crude and haven't used any since.

Assuming all have similar coverage via satellite, I'd like to hear suggestions based on experience from those using these devices, particularly from any SAR personnel.

The new Delorme inReach looks interesting and has a GPS/map
A sat phone would be great but they are pricy, large and still rely on batteries which seem pretty thirsty requiring a solar charger, ie more weight.

factors to consider: features, weight, coverage, durability, capabilities, etc..

Thanks in advance