Interesting reviews, raising some good questions (in the pre-production era). I see SPoT addressed most of them in their production units. Unfortunately, the reviewers don't have a significant follow-up test of production SPoTs in normal everyday use. (I think the most recent review was dated 1 November.)
Regarding the issue raised in the review about the use of a single antenna for both GPS reception and transmission of data to Globalstar: the two services' frequency allocations are adjacent for all practical purposes, so that shouldn't be a problem.
'00 Duke II
So many toads; so little rhyme