My sister purchased an Eleaf iStick 30 about 3 weeks ago from a brick & mortar who is also an ECF forum supplier. Recently it has stopped working. She contacted the vendor who asks that she bring the device to them for inspection. Since this vendor is an hour and a half drive away from her home, it will be another couple of weeks before she can return it.
In the meantime, I've lended her an original MVP that I was no longer using. It must be two years old and still going strong.