I haven't tried Artstation, but I do really like Behance as another option. Simple layout, but it's really easy to set up different projects/ galleries, and they have an app where you can have your whole portfolio downloaded offline, so it's really simple to have it loaded on a tablet (or phone), to take to an interview with you.
Here is mine - https://www.behance.net/devonmkitt11cb I haven't done much with it yet.. but when I have some more time I would like to flesh it out.
I guess the question you need to ask yourself is what type of audience are you posting your portfolio for? Potential clients? potential employers? What type of message does it send? Unfortunately some people do think it is unprofessional to just have a tumblr, deviant ect and not your own website, so it is something to consider.