I also spoke to a lady in the Target where I purchased it (for $41 for .5 oz) and who was using it. She claimed that it worked on her forehead lines. She was younger than I and didn't seem to have any serious wrinkles to start with, but her forehead was smooth.
For one month, I used it every morning. It doesn't take a lot so one tube should last me a couple of months. I used more than most because I used it on every wrinkle I could see on my face. That included forehead, between my eyebrows (the elevens), above my upper lip (I have a stubborn one there), and around the corners of my eyes. I used it exactly how they suggest - on a clean face before I applied any moisturizers or creams, etc.
After a month, yes, I noticed an improvement. All the lines seemed a bit softer. A few of the smaller lines actually seemed to disappear (I am referring to the very small lines that are barely noticeable anyway). So I am impressed with it.
Will I purchase again? Maybe.
The reason I say maybe is this - the cost. While it did help, it didn't work a miracle. Granted some of the lines on my face are deep (mostly forehead) and while it softened them, they are still noticeable. I am undecided at this point if I will continue to use.
If you have fine lines, shallow, and barely noticeable, then this product is for you. It will help to keep them from getting worse. Also, the less wrinkles you have, the longer the serum will last. You may get more than two months out of tube. For you, it would be worth trying and perhaps adding it to your daily skin routine.
There are two other products that No.7 recommends to use in conjunction with this product: Serum + Eye and the Day/Night Cream. I have no information on these two products currently.
Using these products with Boost Serum may make it work better.
Overall, I am not disappointed in this product, only in the cost. It's worth giving it a try.
Have you used any No.7 products? Have you used this Boost Serum? What are you willing to pay for a serum if it slightly diminishes your fine lines and wrinkles? What do you use and would you recommend it to anyone?