This has been my 3rd purchase of this product, it's my favourite eyebrow pen. The intensity can easily be built up or brushed out in case you veer too close to sharpie brow territory. Longevity is great, I have noticed that sometimes in the heaviest application areas after a couple of hours it can look like it's clumping around the hair follicles but it's not really noticeable and it doesn't happen if your brush the hairs with a spoolie. To avoid that, my preferred way to apply this is the night before. After skincare I can quickly slap this on in sharpie brow fashion without needing to worry if i go overboard, tap over the head of each brow with my finger to soften it and then go to sleep. It won't rub off on the sheets and in the morning it'll look slightly softened and very natural but still providing good definition. It'll last the whole day from there. It's readily removed with micellar water or oil cleansers so you don't have to worry about it staining for ages. I find the pen lasts quite a number of months, i think it was over a year before i had to buy a second one and even then i can still use that first one, just have to go a bit heavier on application. Be aware, the pointed tip is really only good for filling in the brow, not for drawing individual hairs. It'll also blunt a little with time but since i just use it for filling it it's not a problem. Overall a fantastic product at a great price, lasts ages and works wonders.