afeared of the inevitable set up hassle, wire tangle nightmares, configuration times
Essentially non existent: as they say, take it out of the box, plug it in and off you go
Everything, but everything, just works.
AppleMacster has covered just about all of your queries admirably. Re the mouse, it does take some getting used to the fact that it is programmable for left click/right click, although the design intuits otherwise.
I have OfficeMac, works fine, but it is an MS base, and frustrating for that. But it's cheap, and can be installed on countless Macs, unlike the PC limit that you'd be used to on MS.
Time Capsule is just brilliant, I've restored whole directories that mysteriously disappeared plus restored a lost MacBook when the original was lost. No reinstalling programs, finding passwords, etc. Complete ghost of the lost MB at the push of a button: brill