Question of the decade; they are worth their price if you take account of the software+hardware integration. Honestly, when you have like only 10~ devices to make an OS for, with virtually no aftermarket components to account for, the software integration is pretty tight.(The battery life, the overall system performance and as such is due to that). Now take account of the build quality, honestly, no other manufacturer integrate such built in their laptops, atleast in India with same price point(unless you want to go with Precisions and Laptops).
Now for the OS; Mac OSX is highly; how to say; elementary ?. A power user(read,I don't mean professionals) will not like it, a windows user might have trouble with shortcuts and even basic stuff like how to set default programs(for initial two to three months. Old users like me still have problem when I switch from imac to windows machine). Windows, no matter how buggy it is, how much overhead it contains, has everything, you can play with it with your heart's content(I mean not like Linux, but not so restricted like OSX).
One the software side; definitely OSX software library is tiny when compared to Windows, but most of the stuff made for OSX is better than what is available for Windows(as a subset, not counting common applications between both platforms)(eg pixelmator ?, sort of cheaper than ps, but does the work).
It all boils down to the choice of OS/Software your family member wants to use; and since you have not stated the requirements, it is hard to evaluate the price.