Sounds right...

They may be wrong, 0.4 mm/year is more than worst-case scenarios suggest. Also, according to another probe's measurements (can't remember the name...) Antarcic ice sheet is actually thickening (which too may be caused by global warming).

Melting the whole Antarctic ice sheet is not realistic, unless something really catastrophic happens (for example, vast amounts of methane released into the atmosphere). However, the Western Antarctic ice sheet is much more unstable than the far larger eastern one. AFAIK it has melted several times since Antarctica froze.

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Science is a way of trying not to fool yourself. The first principle is that you must not fool yourself, and you are the easiest person to fool.
-- Richard Feynman