Once you get past the fact that there are a few bugs and random crashes its actually a good game, there need to be a few UI improvements especially with the chat and friends function as there are a few annoying features about them. Mainly the fact you can't add friends when they're offline and also the chat panel, whilst seeming small, also seems to take up a big chunk of the screen when its open.
The graphics aren't too bad, people who have said they're rubbish need to play it on higher settings. While they're not amazing you cant expect incredible graphics from a "mmorpg" (use the term loosely coz tbh the multiplayer factor doesnt come into it much with 90% of the game being instanced and even the stations are semi-instanced so you only see a fraction of the people playing)
Playability is good, much like diablo and WoW it gets pretty samey with "go here, kill this, activate this etcetc" but its still addictive which makes people play these sort of games.
The ideas and imagry are cool, with the different factions all having distinct looks and play styles. Going through parts of London that are well known is quite sppoky too, especially the 1st time i went through picadilly circus and thought "damn, this place has changed in 2 weeks"
Overall its a good game, not the best, but its gonna keep people occupied for a while