I have a feeling this will be the best Bond in the Craig era, although it may sadly initially not be perceived as such because it is going to be very difficult to top Skyfall financially. However, I think it will have 'legs' as they say because Eon has been here before and knows they should not screw it up.
As long as Eon thinks does the following, I think we are going to be alright:
1. tries to craft a truly excellent spy caper with proper plot lines (the return of Purvis and Wade worries me terribly),
2. has excellent cinematography and locations (looks promising so far)
3. has attractive female leads who know how to act, rather than some hack (i.e. Berry or Richards) - I think we're ok here with Seydoux's casting
4. has a sinister villain who delivers menace, rather than some wimp (think Almaric or Carlyle)
5. does not spend too much time on Harris, Fiennes (since they are semi-A listers I have a sad feeling we will get more time spent on these characters, who really should be just fill-in rather than anything more),
6. does not spend time on Bond's childhood or his inner bloody demons (enough with this nonsense already - it's been played to death since the Brosnan era!)
7. does not have a turncoat MI6 Agent or a Bond's equal from another country female agent (again, done to death in Brosnan's time)
8. makes sure the money is up on the screen (no problems here most likely - they're flush after Skyfall)
It's the 7 items above that worry me. If they get the above right then they could really craft a classic with Mendes and Craig in top form after Skyfall. Regardless of how it does at the box office (likely to come in short of Skyfall) it could end up being a classic for the ages, like 'Living Daylights', 'On Her Majesty's Secret Service', 'Goldeneye', 'Thunderball', 'Spy Who Loved Me' or 'From Russia With Love'.
I think we're in for the 'Thunderball' of the Craig era (a slightly bigger, more ambitious 4th act to follow a very successful 3rd act). The trick is to give us a Thunderball and not a Moonraker (also a 4th act following a absolutely fabulous 3rd act classic) that while very enjoyable, went a little too far towards kitsch