Between the wife (W) and I (M):
(W)Mini iStick, got it too late to be useful.. even separate board wasn't able to do anything to the coils we use now.
(M+W)iStick 30's, just retired two, one was repair with a separate board.
(M) iStick TC60W, still going strong
(M+W) iStick Pico's - Loving them! With the exception of connection issues due to the 510 connector, these have been great. Using a "washer" made from a plastic card solved the connector issue. (W) is bugging me for a rainbow version
. I have two separate boards that I'm setting into box mods now.