But you could use a wireless Apple keyboard in a wired fashion by simply keeping it plugged in all the time.
Then you have a keyboard that costs as much as a wireless keyboard, has the same latency as a wireless keyboard, the same susceptibility to interference as wireless, the same possible problems with selecting boot options before the keyboard has connected etc. but still needs a wire. Worst of both worlds!
Main obvious criticism is that the Satechi doesn't have a USB hub like the old Apple wired KB: a couple of USB ports for flash sticks and mouse dongles is really useful on an iMac.
Not for me because I'm hoarding a spare Apple wired w/numeric pad - plus doesn't look like Satechi are offering a British layout version.
Don't really see much of an advantage to these keyboards over stock.
Er - less than half the price? I'd also want to feel one - although the current Magic Keyboards still have scissor keys, they have reduced travel c.f. the old ones, have a shallower angle and feel a bit on the flimsy side - they somehow manage to be lighter than the old model despite including a battery...