Hi, Is anyone using the MedPulse vest system instead of the ABI Vest? If you are I have a few questions about it. Do you like it?Did it take a long time for insurance to approve it?Have you had any problems with it? If so, did you get help from the company quickly?We are waiting for approval for this system for our four year old daughter, Rachel, but I thought maybe some teens might be using this system. Thanks!Andrea