yes, it is.
i did dxm way before i ever smoked weed, actually. it's a crucial trip for $0, if you're so inclined to lift either a bottle of tussin (i'd suggest cvs tussin maximum strength) or a box of coricidin cough & cold (yes, yes, the other drugs can react badly if you're stupid enough to take massive amounts of it, but i've used ccc's several times, once taking 16 pills - one of the most enjoyable dxm trips i've had, and it's a refreshing alternative to chugging syrup you may be accustomed to vomiting up after the first couple times; your body soon links the syrup to the nausea it sometimes causes - even so much as looking at a bottle or thinking about the syrup's consistency could make you want to puke).
be forewarned, though, that dxm is one of those drugs you either love, don't care about, or have a very bad experience with. though i'm lucky to have only had very nice trips on dxm, a friend of mine suffered from the robo-itches, lots of vomiting, and didn't have fun at all. personally, i love it. he obviously didn't. for my first trip, i took a 4ounce bottle of cvs tussin maximum strength, and it still had a pretty nice effect on me. that's what i'd suggest, to be sure your body will actually react in a desired manner to the dxm.
i haven't done dxm in about a year.. i guess i just haven't felt like it. i've been more into smoking, lately, but i still look back on my dxm trips fondly and don't doubt that i'll do it again sometime. a dxm trip has the potential to be one of your best ever, as well as your worst.. check out some of the accounts on erowid (especially the glowing experiences, haha) - http://www.erowid.org/experiences/subs/exp_DXM.shtml - and have fun.