Bought my Careprost from inhousepharmacy.biz with no issues and got a good working product. :o)
General comments: I have been using this product for over 4 months now. I apply this nightly with the method suggested by other MUAers; by placing one drop in the cap's well and using a brush dipped into the drop (only one drop is needed for both eyes.) Instead of a makeup eyeliner brush, I actually use a very fine artist brush that I bought from Michael's. This way, I get the product directly into the lashline and no where else on my eyelid. (I have avoided that "pink puffy" line along the eyelid that some people experience.) I am extremely careful about application--I don't think it's a good idea to get this stuff into your eyes if you don't have glaucoma. I dab the product into the lash line twice and this completely uses up the drop. Then I wash and dry the brush and cap after use--every time.
First month: The first two weeks I used this, my eyes were red and rather dry. The constant redness subsided after several weeks but I still notice that my eyes become a bit red everytime I use Careprost. I use it on most nights, so I don't have to worry about going out in public with slightly red eyes. The first month, I didn't notice much of a difference. I am half-chinese, so I naturally have the typical sparse, short lashes. I wasn't so much interested in developing length as I was thickness. However, after about 4 weeks of use, I noticed that *some* of the lashes were *definitely* several millimeters longer. Encouraged, I pressed into month 2!!
Second month: By the end of the second month, my lashes were *definitely* looking impressive. Several millimeters of growth on most of the lashes by this point. I was floored. This stuff....actually works!! I had never had lashes this long, ever. I had tried falsies in all sorts of styles and many types of mascaras, but these were mine, all mine!! Still not as much thickness as I would have liked, but the length made them noticeable. I began to notice that the treated lashes began to curl a bit, and some developed a "kinky" sort of look.
Third month: By this time, my lashes were getting...I'll just say it...ridiculous. I would never, ever have dreamed of using that word for *my* pitiful eyelashes. I always wore thick eyeliner to try to make up for my lack of a lashline, but by this point I ditched eyeliner *completely.* I began to notice a little extra thickness, and lashes growing in the INNER corners of my eyes, near the tearduct....where lashes have never grown before. Oddly, the lashes towards the inner corners of my eyes (those on the actual lashline) grew the longest, and not the ones on the outer corners. I actually had to let up on application towards the inner corners of my eyes, as these were getting so long it began to look silly. I also had to let up on mascara application, as my eyelashes now looked so long that they just seemed fake with too much makeup on them.
Fourth month: Lashes have not grown longer than they were in the third month. I was hoping to have developed at least more thickness by this point, but they seemed to have reached a "standstill." Overall, I have gained 4-6 millimeters total on lash length from when I started, I kid you not.
The WORST thing about using Careprost is that it seems to get your lashes on the same growing cycle. So they all seem to shed at the same time. I noticed this was the worst after 4 months of use. Clumps of them would fall out for days at a time, so while the few I had left were extremely long, one eye would have more lashes than the other, and both would be super gappy. This is very frustrating. You just have to be patient and let them grow in all over again.