This foundation is definitely Longwear! It last all day for me, with out having to touch it up which is perfect as i often don't have time for this when I am out!
The only slight downfall with this is compared to other MAC foundations its a lot darker colouring. EG: I am normally NC15 in MAC foundation, but I would consider MAC Prolongwear NC15 more of a NC20. But that doesn't worry too much as I mostly wear it when i'm going out clubbing or to special occasions where I am normally tanned or wear bronzer anyway.
I finally brought my first Mac foundation & i wish i brought it sooner!! I love how you can build up the color where you need to and how you can reapply later in the day without the patchiness ( which is what i found with estee lauder double wear) very easy to blend & gives an amazing finish, the coverage is amazing & it lasts most of the day, it leaves my skin looking airbrushed and flawless, hands down my most favorite!!!
Tips: I prefer beauty sponge to foundation brushes, gives more of an airbrush look