First let me tell you that I jumped on the longer eyelash hype a year ago by using the Jan Marini Age Intervention Eyelash conditioner with good results (length more than thickness) but it took about 10-12 weeks before I started to notice any results.
I have now been on Latisse for 4 weeks and I'm already noticing a increase of the amount of eyelashe and length of my eyelashes. I am using it on my eyebrows too as they have thinned greatly at the ends and I'm seeing more hairs there too!
The drop bottle and individual applicators makes it easy to use and easy to travel with. I do have blue eyes and they are still blue; I know that if you actually get the product in your eyes there is a chance it can darken light eyes but getting it in my eyes hasn't been an issue at all so I'm not worried about that.
So far I am very impressed with Latisse and will update my review as I continue to use the product and upload photos to show the change also.