Good, but not good enough.
Gameplay is really what it all comes down to in the end, in spite of the above 'pros.' For it's where the 'cons' come into play that critique are taken seriously--BSA51, though packing great graphics as is expected from the 360, has sometimes inaccurate lighting, poor frame-rate, unexplained explanations, and most frequently just not enough space and aiming lucidity to discern all the freakishly-cool enemies.
The people, especially their faces, however, are done terrifically well. ANd while the voices may occassionally become repetitive and dull, the first few humorous comments from your teammates are always uplifting and fun to hear.
The arsenal and vehicles, as well as emplaced weapons, are impressive but not impressive enough. The jerky feel of the unrealistic driving maneuevers in Humvees and SUVs are almost PSPish, and while most of the armaments are imposing and effective they lack in the ability to aim efficiently.
All-in-all, BSA51 is a good game--and better than the first by means of difficulty and eloquency yet not clarity--but just not good enough.
3/5 & 7/10