Review (5/5): Effective if applied properly
I tried this product about 6 years ago. I was impressed with the results, but I had to get the hang of applying it properly.
The rule is "less is more". Applied with a light touch to the problem lines, and allowed to dry completely, you have a chance to remove any flakiness where too much got on. Use a slightly dampened QTip. Once you have "tidied up", you can then apply your foundation.
Another tip is to do the various line areas at different times. This takes bit longer, but it allows you to keep you face still while each section dries. Particularly where those pesky around the lip lines are - you need to maintain that area as still as you can with a normal expression, until the serum has dried.
I found that whenever I used it, I got a lot of compliments. I found it would last 4 to 5 hours. I think it's a super product if you have a photo shoot, or a special date, or some occasion where you really want to look great.
Because it is not sold in Canada, I don't get it often. Each time one gets something from the U.S., our stupid customs people tack on a huge fee. If it wasn't for that, I would get it all the time.