I think you made a good choice, unless SPOT has improved a bunch over the 1st ones.
I rushed to the store and bought one of the first SPOT's to hit the market, it was spotty and you never really got a confirmation that your message went through. I really wanted it to work so went out of my way to make sure I got the most from it. I even had troubles standing at the peak of a 7000' mountain on a blue bird day at zero degrees, lot's of mountain peaks actually. I let the subscription expire and the SPOT unit is floating around in a bin full of other electronic gizmo's that have likewise outlived their usefulness.
I have a newer spot ,three years old maybe. The reason is I hunt alone a lot. My wife wants to know I am ok. So I have the spot set up to send a "I am hunting here today Message" and when I get back to camp for the night I send the custom message which says"I am ok and in camp for the night. I dont use the tracking. Mine works good I think, Because where there is cell service I receive the message on my phone.
I also have it go to my email both work and home. I have compared the send times and receive times when I got back and they run any where from 5-10 minutes most the time.
So I guess it depends on your goal. To get help when you need it? Or reassure the family? Or both?
If I were going out of country I might consider the PLB's though.