I have 5 pairs of the FJ Flex and love them all. I honestly wear them almost everyday to work or out after work. Super comfortable and has worked out perfect for me on a few occasions where a buddy gives me a call to come over and play a quick 9 after work. Since I had no desire to make an effort to slap on golf shoes (always FJ, just many different styles) I just left on the Flex and went at it. It was later in the day, and not wet out at all. The Flex performed great, felt great, and had happy feet after the round, and yet saved some time changing shoes in the locker room that I reinvested up stairs at the mahogany bar with a nice cold beer to wrap up the day.
I do not often wear the Flex while playing as I mentioned above. My go to shoe was always a very stable type of sole, Synergy, then XPS, and now TourS, but I have played with many different spikeless models as well. I guess it all depends on the day. When I know I am getting a little quick with my swing, I will play my next round in a spikeless pair. I guess mentally it helps me slow down my swing, knowing I am not "grounded" or in contact with the ground as much when wearing a spike shoe.
To be honest, @$90 a pair, you really can't go wrong. Even if they don't work for you on the course, you will not be wasting your money, as you will also gain a Super Comfy shoe to wear or add to your collection.
Best of luck, and let us know what you decide to do. It would be great to hear that you picked up a pair and they worked out for you....
All the best,