I bought the 510 when I started. Many advantages (good vapor, realistic look and feel, good flavor.) But there are also many disadvantages (horrible battery time, lots of fiddling to get a cartridge configuration you like and most end up dripping before they find something that works, parts inconsistencies from vendor to vendor.) I like my 510, but I am laid off, never leave the house, and have all the time in the world for fiddling right now. If I was working, this probably wouldn't have worked as I wouldn't have the time for all the fiddling and learning.
That being said, my mom asked for an e-cig for Christmas, while I love them and tell everyone they should try it, I knew getting her a 510 was a sure fail for her. I ordered her an Ultimate Ultimatum vapor king kit from Vapor4Life with lots of catromizers and juices to get her going. After the abundance of stuff I got her (total was over $200 and I used the smilin20 code to get 40 some dollars off.) The total was $172 and I am wishing I would have started off that way myself.