I tried it, but i couldn't get it to work for me. I was coming from an Apple Wireless Keyboard and the size of the 4000 was just to big for my taste. I got pretty used to having my mouse pretty near my keyboard and not have to spread my arms very far.
I had a mechanical keyboard for a while after the AWK, but my hands did hurt after long programming sessions. So i gave the Sculpt a go.
It took me a while to get used to it, since it's also wider than the AWK, but not as wide as the 4000. Since i had to fix my hand-hurting issues, i powered through it and now i'm pretty happy.
So to answer your question: Since i was using an Apple Keyboard for years, the click-clacky laptop-style keys were not in issue for me. :)
Excellent thank you for the response, the 4000 seems to be getting replaced by the Sculpts so it's good to know they are still good, I have a 4000 at home, work and a spare in it's box for if either breaks (they are that important to me now) but I might give the Sculpt a go, I rarely use the numpad and the 4000's are indeed huge.