After trying an Apple keyboard at work I bought one for home as well.
I've adopted the @/" switch (Even the "British English" keyboard has the US layout) - it does help when writing PHP! I have a keyboard remapper so that ## is turned into £. There's a bit of funkiness with the F-keys as ALT positioning as well, but I've soon adapted. Overall my speed on general typing/coding has improved A LOT. Main benefits are:
1) I'm faster, with less travel in distance between the keys I can move my fingers faster.
2) Perceived effort - they keys are so responsive that hands relax a lot more and it feels like my hands are "dancing" over the keyboard, my old 40-50wpm is closer to 60-70 again.
3) It's no bigger than the "compact" keyboards and yet is as close to the standard IBM layout as you are likely to get. I've looked at a lot in this price range and there are some very small arrow keys on some, or odd home/end/pg up/pg dn arrangements.
For under £50, it's an amazing piece of kit.
P.S. I plan to switch to a Mac of some sort later this year - yes, I know I'm doing this in a back-to-front way