Review that matters: I am a mechanical engineer by trade. One of my coworkers had this at their desk and I constantly found myself borrowing it so I finally got my own. This is a great reference in a very convenient package. The built in tabs are very nice to have. my coworkers did not have them so they were sticky noting tons of pages (not that you wont find yourself doing that on this version either).
Something that doesn't actually matter, but I still have an opinion on: Lame cover design. Feels like the Guinness book of world records. Almost bought an old version when it had the nice leather bound covers. Hopefully this one is more durable than I think it will be since I will probably get a lot of use out of it and don't plan on replacing it.