I have had a 1st gen SPOT for years now and really like it. My mom really likes me having it I can send her the link to my SPOTWALLA page and she can track where I'm at and that calms her down a bit on my longer range excursions.
I have had luck dropping it in a jacket pocket and having it still work. I also velcro it to the fairing on my bike a lot and haven't had any issues there either. But as stated above that could leave me with no SPOT in the event of an accident.
2004 Suzuki DL650 Weestrom
1978 GS 1000
"Those who would trade security for a little temporary safety deserve neither liberty nor safety."