I'm happy to find other forum members still interested in this subject. I bit the bullet and bought the Professional Model. The unit is light and the case easy to attach to a belt/srap. The mask is sealed. The googles are flimsy. I susbituted swim goggles. There's also a fauxton and an anemic whistle. Both on a lanyard. Lastly, the practice mask is a welcome addition. I'll probably buy more for the rest of the family.