Update. I have been using it. Very happy with it.
In fact it solved a problem this morning. I was trying to do a closed transfer from fermenter to serving keg. Everything was set up right for it, but I could not get the syphon going.
Finally I took up the liquid post and pulled out the metal pipe. This keg had not yet been moved over to FLOTit. It still had the pipe running to the floor.
And the pipe was packed with trub and yeast.
I removed it, replaced it with a FLOTit and then it transferred just fine.
I am in the process of transferring all my kegs to FLOTit.
The only cons I can think of is the p;rice. But it's a fair price for what you get. Also at one point when I was washing out a keg, the filter slipped off the tube. But to be fair, I should have removed the whole dip tube before washing up and banging it around.
I suppose I could say that with the thin pipe the syphon flow was slow. But I'm always busy doing things, so that's not an issue for me. I prefer to have the thin pipe, so it slips through the keg opening from the top.
So yeah. Big fan.
As someone who came back to brewing from the eighties, I feel like Cap America, unthawed from ice and constantly amazed at this modern world. Floating dip tubes. Spunding valves. Refractometers. The Internet. Goodness, I don't know whether to clean a keg or wind my watch.