After a little research on the pros and cons of this device I discovered that it is a fact that any bee larva or eggs laid in these plastic cells are killed when the handle is turned to release the honey.The device is profit driven and not beneficial to the well-being of the hive.
This Flow Hive was on snotr about a year ago.

Here is a very interesting critique of the flow-hive system...

http://www.milkwood.net/2015/02/26/going-flow-flow-hive-actually-good-idea/

#1 That would be true but any beekeeper who is serious and wants a good honey harvest would be using a queen excluder between boxes so there should be no eggs or larvae in the honey frames.

My main concern with this system is hygiene inside the hive. For a few reasons too many/long winded to list here. It's a great little gadget for hobbyists and those who only have a few hives, don't want to spend big $$$ on a real extractor/equipment. But it will stay in that market, hobbyists and small timers only. Which is also great, if this thing encourages more people to keep bees then I'm all for that.

From their website:
"Occasionally we have found that a queen will lay a few drone (male bee) eggs in a flow frame. This doesn't stop the flow frame from working, but does kill any drone eggs or larvae in the cells when an extraction takes place.
It is up to you if you want to use a queen excluder or just strain the jar of honey if you see drone eggs or larvae in your honey."
I doubt that the majority of people buying these are serious beekeepers. We can only hope.

It turns out this is bullshit -> https://www.youtube.com/watch?v=X4v4IHGvPLA