Serum for Sun Spots

I purchased this product from a high end spa locally. I used Vivier products for all my other facial products so thought this product would be a good add in. It is quite pricey for the amount of product you get and to be honest, I haven't noticed a very big difference. It has a nice texture (oil but soaks in, dropper to apply product is good so there isn't too much waste, but the smell is weird and 'chemically'. It smells like rancid apple juice (can you tell i am mom!). Make your own choice on this but i won't be buying again for big $$.