A friend of mine bought me this cream on my first pregnancy, I did as the instructions said and used it daily rubbing it onto all the places likely to be affected. It had a lovely smell and texture and seemed to moisturise well, but sadly it didn't do it's job. At about 6 months into my pregnancy all these lines started appearing on my stomach (luckily only my stomach).
On my second pregnancy I did the same again but with another brand, I got more stretch marks on my stomach and aquired more on other parts of my body.
I don't believe these creams work, they may limit the amount of stretch marks you will have (I have too many to count) but at the end of the day I think it depends on the type of skin an individual has and how elastic it is!