I think PCB cad packages are to PCB folks like anchors to sailors - many different types, with some working better than others - depending on use. Yep, I have my opinions on anchors as well 
ExpressPCB works pretty good for the hobbist who etches own boards, sorta limits to double sided max, but I have known a couple of folks who did a 4 layer board at home. There are more folks than you might think using that package.
For the person working toward a "serious" board work, I'd think KiCAD or Eagle would (might?) be the package of choice, but diptrace is pretty good also.
Have fun - play with several of them. Things you learn in one package sorta carry over to other packages....
Ken H>