I have tested the L'Oréal Paris Revitalift Instant Eye Bag Eraser and think it is quite okay.
It provides a fairly quick tightening effect under the eyes and can make the area look a bit smoother, especially when you are tired. However, the effect is more temporary than long-lasting, so it is more of a quick fix than a permanent solution.
It feels light on the skin and is easy to apply, but the result can vary a bit depending on how much you use. For me, it works best on days when I just want to look a bit more awake without too much effort.
In summary: good as a temporary refreshment, but maybe not a miracle product.
The review was conducted on behalf of Smartson - the test pilot was allowed to try the product for free.