Inkscape has some similarities in use as far as its platform but there are many differences.
If your doing simple vector graphic designs and just starting off I would use inkscape.
Its pretty easy to use in my opinon. The only problem I had when I began using the program was when I did my color seps that have circular shape. If you print off the program it prints funky and sometimes makes your images look like ovals.
Just a tip once you get to the printing phase of your plates save them as pdf files and then print them from the acrobat printer. This way you will get the color seps without any registration problems.It will save you the heahache such as your print settings.
No complaints here just like every software it has its quarks.
If you want more help with the software shoot me an email.
just on a last note I did find a site that shows how to do color seps. Its not perfect but its a start as well.
Tutorial Number 7
I plan to do a tutorial on color seps since this version is almost decent because it doesnt discuss the white base you put underneath if your printing on darks.