The only force feedback flight control commonly used in the Condor Soaring community is a Microsoft model from many years back, and has been discontinued for some time.
Further, our understanding is there is some intellectual property potentially involved that is keeping other flight control manufacturers from copying the MS design approach to this type of mechanism.
And sure - if you wanted to look far and wide in professional/commercial or military type systems, I bet you could find something. But this is a consumer system, and even $300 to $500 USD flight sticks from other major manufacturers don't have force feedback. And there are reasons for that ...
Our own stick internals are custom designed / tooled / manufactured by Just Soaring. We aren't using an off the shelf internal mech. But if you wanted a comparison, it wouldn't feel a lot different from a Logitech or other mass market / consumer facing joystick.
As for being “realistic”  -  that’s all pretty relative …   I mean you are in a piece of T slot aluminum on the ground …  looking at a screen  (or VR goggles).    So realistic is many shades of gray and subjective user interpretation …   The rig isn't on a motion base - so there is no "seat of the pants feel", and there isn't force feedback so no, you aren't going to get big resistance on the stick when you bank hard into a thermal or anything.
Design and manufacture is all a game of trade offs. We have to pick our battles and we wanted to make something that was functionally strong across the board and affordable for flight schools and individuals. Not to mention we have no interest to go lock horns in any patent fights with anybody.
Personally for me – stick feel on a glider, unless you are doing big deflections or aerobatics are pretty benign and don’t have a lot of feel anyway….   The big “feel” thing glider get is more in the pilots ass / butt / seat area than the stick.  But again - we aren't doing motion base, so that is irrelevant. And that’s way beyond the scope of the product. We have no plans for motion base ….
So in the end, our stick would feel a lot like any other center return spring joystick on the market…  As for rudder pedals - same thing. They are center return (spring force).
There is resistive force (spring loaded) on the joystick / flight stick, rudder pedals, and airbrake/spoiler handle.