It is a highly addictive game, However it does suffer from many flaws which denys it a higher rating.
Pros:
graphics improved, gameplay slightly quicker then fifa 08, great presentation and music, Commentry good, great dribbling system, online play better then before, manager mode has more features, players make better runs, better finishing, excellent create a celebration,adidas live season means players skills updated weekly(however does not work in all tournemants), good offline session for 2 players, good new online features such as ultimate team mode, downloadable transfers pack to keep the squads up to date. be a pro improved.
Cons:
aI for the computer makes them excellent at tackling,poor collision detections, card happy refs along with some poor decision, goalkeepers can become unplayable when you are losing as they save everything, player movement is fixed so you cant run and move to the left or right slightly and instead you a 90 degree turn, Tackle system harder for the player, cant improve player ratings in edit player mode, computer can make poor substitutions, injured players perfomance is not effected by injury, can be slow at responding to commands especially online, can get laggy especially online, computer can out muscle you almost all the time and they can get pass your players without even dribbling, 99% of ur corner kicks will be cleared, free kicks almost impossible to score, shots lack power which makes it less realistic especially in penalties when you use full power and kick it straight only for the keeper to catch it and that never happens in real life and some glitches like players legs going through the defender to score the goal, computer ai fouls to much even when a player already has a yellow card. too easy to score when shooting is assisted and almost impossible to score without assistance,ai automatically do things you dont want them to do like clearing the ball out for a corner for the opposition when u could have got the goal kick, poor sim results (newcastle came second in the league when in real life they got relegated), computer becomes almost impossibe to beat when they are winning as players become better and then they become easy to beat once you score 2 goals as it can easily become 5, computer is too accurate at clearing the ball, players respond slow at times even when the ball is next to them and finally the the ref doesnt give advantage as much as he should
Conclusion: All these pros make the game highly addictive especially when you can update the transfers and online play is excellent. There are many little flaws with the game but the major flaw is the collision detection is completely wrong as players will fall over as soon as they make contact with the computer ai. However, despite this the game is highly addictive and these features give it the advantage over pro evo, i only hope that they address these issues in Fifa 10 especially the collision detection