I’ve been using this eyelash dye for 4 years now. I love it, I have not had to wear mascara in the last 4 years.Some things to note as I have been using this for so long: I have not ever had any problems with skin irritation or lasting eye irritation, and have not had an excess of eyelashes fall out or anything. I tend to extend the time between uses to about 10-12 weeks, when it is completely gone I’ll redo it. I use Vaseline all the way around my whole eye before applying the dye, as it makes it so that it won’t stain the skin and can wiped off.If you get this in your eyes while applying, you will instantly feel your eyes begin to burn, and you should not attempt to save it. Just wash everything all the way off, rinse your eye extremely well, and try again tomorrow when your eye has had a chance to recover. After the first couple of attempts, l learned to apply to the roots of the lashes from the outside of the eye, instead of the inside like you’d do for mascara. Avoid getting any on the waterline, or it will make your eyes start to burn and you’ll have to wash off and try again. Look up and push it into the roots up from the cheek up for bottom lashes, and close your eye and push into top lash roots.If your dye isn’t mixing into the developer well, mix harder. It doesn’t dissolve into the dye on its own, you’ll have to smush it and mix it a lot to mix properly, it generally takes a couple minutes.This dye will stain your countertops and washcloths so use caution to protect your workspace and only use washcloths you don’t mind being stained. I recommend keeping q-tips on hand to wipe away excess dye, but take care to not place them into your counter or sink if they have dye on them.I strongly recommend applying this before showering. Use a washcloth to carefully wipe away all the excess dye wiping out and away from the eye, then you can rinse really well in the shower. I’ve not noticed any problems with the longevity of the dye doing this, and it’s much easier to fully rinse everything away from the eyes.All in all, I personally love this product. It can be a bit frustrating to dial in what to do with it, though, and can take a few uses before you really figure it out. For me, it was worth figuring out so that my naturally blonde lashes are dark and I don’t have to use mascara ever again, no more makeup running down my face or flaking off, and I only spend about 30 minutes every couple months to achieve this. I just use an eyelash curler and it looks like I’m more put together for weeks, so the trade off for me is totally worth it.