Update from here too…we opted for full face Decathlon jobs for the kids and they loved them. I was pretty strict with them in terms of nausea, headaches etc get the thing of your head and take a break. Never really happened though and we found them easy to remove rather than the difficult process some had mentioned.
I used a normal style as I’m whiskered up and didn’t want a full face leaking on me. I had far more issues keeping de-misted than the full face versions. The dive school suggested burning a silicon coating off my mask and even using toothpaste to keep it clear. In the end the best option was the old spit and rinse – I had been cleaning it too much!
I found the traditonal variety of mask gave better peripheral vision. As an aside, it was fascinating to see the island’s marine biologist snorkelling – just diving down deep and seemingly staying there for bloody ages – all calm and gentle, god knows how she did it!