Hi JoB,
I use a Delorme InReach. I selected it over the SPOT because:
- same reasons as SPOT, plus
- Iridium Satellite system
- Two way texting (Including with S&R if the situation warrants)
- Positive indication when messages are successfully sent
The InReach batteries last ~ 7 days, so no real need to turn the unit off after sending a message or leaving a bread crumb. I just let it run. I also carry a spare set of batteries (AA), so even if it did run out of juice I would just change the batteries. It does tell you when the batteries are low (assuming you look at it from time to time). In the case of the InReach, it will continue to "send" the message/bread crumb until it is successful. This info relates to an older model, and the battery life, etc. may be different for the newer models. Check the Delorme web site for better information.
No known problems with subscription services. They even offer a service than you can activate/deactivate as needed. I use the "emergency" plan. Cost is ~ $11.00/month to $20.00/month. $11.00 is if I'm not using. ~$20.00 is if I have done a couple of longer hikes with several messages and many tracking points (bread crumbs).
