I use it on the deck - it works really well, however you can definitely see the artifacting when fast motion is occuring. There are also some odd bugs when using SMAA with FSR turned on, where the frame gen model gets confused and starts moving the game UI/HUD with the camera.

Apparently it works much better at framerates above 60FPS since the model has more data to predict future frames...

If you have genuine DLSS available it's probably better to stick to that IMO