I have it, bought it for my "prom" (Austrian version of it). It's double the width of an epi pochette, but I rarely carry it because I often have to take lots of stuff with me (student). Anyway, if you just carry essentials like wallet, keys, mobile, handkerchiefs and makeup it's very nice. If you already have the mono pochette (which I don't) I would not get it because I think both are too similar (from the space you get, again the trotteur is just as roomy as two EPI pochettes, mono obviously fits more)