both completely different set up, Rosetta you have to sit in front of pc and click on the correct phrases. Linguaphone you can play in the car, its amazing how much goes in the subconscious, as KKOB says very useful for the florist yakkinde cicekci var mi is there a flower shop near by !
www.turkishclass.com is very good, and also you can download the whole federal state turkish from
http://fsi-language-courses.com/Turkish.aspx but this doesn't have anything written - it is a series of vocabulary and grammar drills , more useful when you get to intermediate level
so many resources available, but if you're not very disciplined best to attend a lesson each week if you can