Hey Laura,
I have been using the Smart Vest for about 1.5 years now and I love it. I used HillRom's vest for like 10 years but couldn't get my insurance to cover the upgrade..luckily the Smart Vest worked out for me. I really do love it and like the way it shakes me in comparison to my older vest. Not much more to say about it other than it travels very well (have taken it on 12 or so flights with no problems).
Let me know if you have any other questions.
Rock CF,
Em