This is a very nice game but I recommend it only to die hard "Old School" manager games fans. The rest better stay away from this.
Also the steam version of the game is buggy. You must apply the following fix in order to play the matches:
1. Disable temporarily windows UAC. (Here is how: http://windows.microsoft.com/en-us/windows7/turn-user-account-control-on-or-off )
2. Download www.wbmgame.com/files/registerdx8.zip
Unzip inside "C:\Program Files\Steam\steamapps\common\world basketball manager 2010" and double click. Note that if you are using Vista or Windows7 you must right click the file and select "Run as administrator"

This is from the official website FAQ & Tech Support: www.wbmgame.com
There is also a 2014 version there that is bug free.

Buggy and unsupported. There are far better Basketball Management games out there. Don't be fooled into thinking this one is the best one simply because it's on Steam. Even at $1 you've wasted your money.

This game was not terrible. At all given times in this game I knew what I was doing and I did not have a ♥♥♥♥ty time.

GOTY

WBM series is currently the best basketball manager game, but this 2010 version is pretty old and also the steam setup has some bugs that don’t exist in the official version.

Although that you can give it a try for the low price that steam offers it, it would be better to buy the new World Basketball Manager Tycoon version here on steam, or just download the WBM 2014 from the official website. They offer a 2 days free trial which I recommend you play to find out if you like the game, as this is a game only for die hard sport manager fans.

Even if you like sport manager games don’t start playing before to see the tutorial video and read the manual and the strategy guide. This is a very complex old school basketball simulator and you will need all the info included in the manual. But you will be rewarded for your time with a very realistic basketball game simulation and a very challenging A.I. especially inside the games, where you’ll see that the opponent manager will try to answer most of your orders and substitutions as best as he can.

Another huge plus of this game is the big database that let you make a career all around the world.

So for some quick positives and negatives in my opinion:

+
Realistic simulation of the basketball world
Huge selection of Clubs, Tournaments and National Teams

-
Ugly Graphics
No player trades and loans only transfers