I am also 5'4" and 115 lbs, and of the 20+ boats I've paddled, the micro 230 is by far the easiest to roll I've ever tried. It is narrow, and round, and the thing just wants to roll! Having that knowledge, I think it it her technique and another roll clinic with a good instructor will probably be the best bet. Otherwise, have her try a bunch (demo or borrow) and buy whatever she likes. I regularly paddle a Fun, siren, salto, EZ, XXX, zwo, and a glass race boat. The micro beats them all in the rolling department. Once I boated a small dagger GT and it was very easy to roll. If you can find one, she should try it. Good luck!