in my opinion , it's better to get MS project , not the replace software . my job is Project Manager , MS project is the most often used software , it's powerful .
in the company laptop , it's installed the MS project , but in my own PC, i also need one .
As you know , the price of this software is not cheap . Finally i got one MS project 2010 Pro key in an online store , mskeyoffer com , maybe you can also try .
they told me this is MSDN version , whatever , it works well in my laptop for more than one year .