Review split into two:
On Line
Never before have I witnessed such a difference between what was the best on line FPS I have ever played to the worst. The last edition had large maps with lots of height gain, no gimmicks, an equal playground and tactical play. The most realistic FPS on line I have ever played. Now, they have made small arenas which are not at all open so you can just run around unrealistically like in COD, no need to dodge sniper bullets, no fun for snipers and all of the players have some weird red Ready Brek glow around them - whaaat?!! Not at all fun or realistic. Luckily you get two hours free before having to submit / purchase your voucher code. I played around 20 mins and was completely gutted. Just put the last one back on again which is still awesome.
Single Player
Despite the on line being a massive disappointment and I am sure the net result will be losing their true fans, the single player is superb. That is aside fform the fact that you are no longer a lone vigilante as per all of the previous iterations and now are accopanied by a squad which can at times be quite annoying.
This is (bar Max Payne 3 and FEAR) one of the most atmospheric games I have ever played and the attention to detail in both the art and effects is unsurpassed even down to standing next to lights and hearing them making an electrical buzz. Fantastic. Also includes a couple of driving levels that fit into the story, the physics of which are really good. I couldn't believe the first driving level, programming the city must have taken an age as it is so big and so detailed.
I hope that the next version goes back to the on-line play and level types that we saw in the last MOH.