N.B. this is for Mint 17 with the XFCE desktop environment.
Pretty much everything works. WiFi and bluetooth work fine, battery is recognised and charged well, eSATA/USB combi port works and allows SMART testing of HDDs, DVD+RW drive works, sound and display work, volume wheel works, touchpad and track- um... this thing: https://xkcd.com/243/ both work, 'Super'/'Windows' key recognised and re-assignable, some of the Fn key combinations such as Fn-F6 & Fn-F7 screen brightness adjustment, Fn-F8 WiFi switch (plus a hard switch), Fn-Esc mute, and Fn numpad keys all work.
Alt-Gr doesn't accent vowels on default UK Qwerty keyboard, but instead produces these characters:
a to z, excluding j:
` to -:
A to Z, excluding J:
¬ to _:
Alt-Gr + j adds this accent to chars typed directly afterwards: ảɓƈɗẻƒɠɦỉƙɱɲỏƥʠʂƭủʋⱳỷȥẢƁƇƊẺƑƓỈƘⱮƝỎƤƬỦƲⱲỶȤ
Alt-Gr + J adds this accent to chars afterwards: