I was excited to try this serum as I am in search of something to help lighten or erase my sun spots. Luckily I don't have too many, so I am trying to do "damage control" and get on top of it. I am still hoping some serum and skincare product will help so I don't have to resort to harsher things like peels or lasering it off.This serum is for night use, but this is something I would normally use before bed anyways. This serum has a cloudy gel like consistency, not super watery but not thick and rich either. It comes in a pump style head, very sanitary for daily use. There is a light citrus-y type of scent, not at all overwhelming but it is a scent that I sort of expect to smell in a product like this. It is almost like a common scent for a cosmeceutical product. Once applied, I do feel a very slight tacky feeling, but it is VERY little and does not make my skin feel uncomfortable. Many people would probably not even notice it. My skin had a slight prickly or cooling sensation, at first I thought it is my skin is reacting to some ingredient that may be too harsh, but after looking at the ingredients list, it doesn't look like there is anything too harsh in this. I'm not sure if it is the peppermint leaf extract that is giving that tingling sensation, but it is very possible. My skin did not turn red, so it didn't look like it was a reaction. Don't apply too close to the eye as you might feel a little irritation, again, a very light feeling.It is too soon for me to say if it works on dark spots but I can say I like the consistency and how it makes my skin feel. Aside from the slight tinging sensation, it does not feel harsh. I really appreciate that they did not use hydroquinone or retinoid, which is something I was expecting to see for a serum that targets dark spots. This is something I wouldn't mind applying nightly, and I will continue to do so until I'm done with this bottle.I didn't see the ingredients list posted on this Amazon page yet so here it is:Ingredients:Water, Glycerin, Butylene Glycol, Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer, Achillea Millefolium Extract, Alchemilla Vulgaris Extract, Alcohol, Bambusa Vulgaris Leaf/Stem Extract, Citrus Sinensis Peel Oil Expressed, Curcuma Longa (Turmeric) Root Extract, Disodium EDTA, Gluconolactone, Glucosamine HCl, Malva Sylvestris (Mallow) Extract, Melissa Officinalis Leaf Extract, Mentha Piperita (Peppermint) Leaf Extract, Morus Alba Root Extract, Phenoxyethanol, Phoenix Dactylifera (Date) Fruit Extract, Pisum Sativum (Pea) Extract, Primula Veris Extract, Prunus Armeniaca (Apricot) Kernel Oil, Pyrus Malus (Apple) Fruit Extract, Sodium Benzoate, Sodium Hyaluronate, Sodium Hydroxide, Veronica Officinalis Extract.