I already have the magic mouse that came with my new iMac 27, but being predominantly a laptop user, prefer to use a trackpad device.
The Magic Trackpad look great sitting next to my mini wireless keyboard and the transition to using the pad is much more natural to me than using a mouse.
I decided to dock 1 star though because on my brand new imac, there wasn't an icon for the trackpad in preferences ... I made sure that I downloaded the latest software update ... still nothing!
Having worked my way through a forum or two, I decided that the best course of action was to download the magic trackpad update (just type magic trackpad update into your favourite browser) ... that cured the problem, but the annoyance was that I had to search for the fix in the first place.
Once going, my review is going to be no less glowing that all of the rest ... and I'm sure that with a bit of practice I will learn all of the tricks. I am reasonably au-fait with most of the functionality from the magic mouse, but the trackpads 3 and 4 finger swipes add more functionality.
There is no way that this will fully replace my magic mouse, as that is still useful for fine 'graphics' work, but I'm willing to bet that I will use the magic trackpad 90% of the time.
One thing I have noticed, and it may be foible of my typing style, but I have found that I need to have the trackpad a centimetre or two away from the keyboard as the tiniest brush with your little finger will send the cursor across the screen.
All in all, a great bit of kit, and if you, like me have migrated from laptops, you will find it invaluable.