Originally Posted by LapLap

Just make sure you are aware of how much has changed since the last (2012) update.
Personally, I still hate going anywhere in or around Tokyo without it. But I’ve also seen it steadily getting less useful.

I have two versions, the first (which was only published 4 years before my 2012 version) doesn’t even include Shirokane Takanawa Station, which is my closest when I’m in Tokyo.
I have to be cautious when using the 2012 version as many new buildings and developments (the area around Shibuya station has become a prime example) are not represented. It’s still a fantastic resource (and for me a necessity), but the downsides are mounting up each year. If they ever issue a new update I’ll be first in line to order it.