I've owned a Model F in the past, but that was in my younger, more wreckless days. I haphazardly removed the spacebar to clean it up, but then threw the whole thing away when I couldn't get it back together. The keyboard was free, so I didn't think about it at the time.
It's the same as I remember it. Lighter force than my IBM Model M, heavy spacebar activation. I would say it feels somewhat lighter than my Unicomp Model M and quite a bit lighter than my IBM Model M, but that may be due to years of use. The layout is great for most of the games I play key, especially the function keys. Still not too wild about the lack of inverted T arrow keys, but everything else is how I'd like it.
The sound it makes is pretty unique, again just as I remember it. Higher pitched than my Model Ms and maybe a tad on the pingy side when released, but perhaps a tad quieter overall. Nowhere near as quiet as my Dell AT101W. The spacebar makes a very satisfying thunk when it bottoms out.
My PS/2 to USB adaptor that works fine on my old Model M doesn't work on this Model F. Disappointing, but meh. At least I still have a PS/2 port on my computer. When I use the adaptor, the lock lights all flash once whenever I make a keystroke and it doesn't register at all with the computer.
Apart from all that, I'm loving it. Easier on my fingers to say the least and the sound annoys the hell out of my roommate, which is another absolute plus.