It seems I deleted my previous review trying to edit it ... (is what happens when the site doesn't have all the buttons for other languages) ... so I'll put a short version of it.
If you wan't a d20 Modern version of D&D 4e ... this is it.
Have a nice day.
You need more? ... ooooookey ....
You'll have classes, ladders (a typical D&D class has been divided in two, class and ladder, and you combine them as you please), new skills, feats, equipment, monsters and new rules involving firearms and such. I suppose clases and ladders could have even more powers and such ... but I suppose this would be more expansion related or maybe web features.