In reply to Flinticus:
For the benefit of the OP, there was a very long and acrimonious thread on here where a horse rider asked people to sign a petition to legalise these things. The general mood was against, but said horse rider was persistent.
The general feeling was (IIRC):
- They are dependant on an infrastructure that did not exist at the time, and (Mountain Rescue?) resources/money could be better used elsewhere. As they are now legal, this argument is now irrelevant.
- They will cause many unnecessary callouts as people become dependant on the 'safety net' they give and/or there will be many numpties pressing the button because they're lost and a bit cold (as has been the case sometimes with mobile phones)
- They give only very basic information to the rescue services - A grid reference and your personal details from a database. If you need mountain rescue, they will have to send someone to assess your condition, then likely send a second group with any specialist equipment needed.
Compare with GPS+(sat)phone, where you can describe the problem to MR and they can provide the best response first time, and give you advice.
Personally, I'm not buying one any time soon. If walking alone I carry a GPS and a phone. If I'm going to a remote place with neither signal nor people, I tend to scale things back a bit, and stay on safer ground.