Zhuyin is conspicuous by its absence - it maps perfectly well to modern keyboards, and requires slightly less letters to write a word ("en" and "an" in pinyin are one glyph, for example).
It's an invented 20th century alphabet, which means there's logic behind it - the left side of the keyboard are initial consonants, in the middle are the vowels, and at the end are vowels with trailing consonants on them like "ang" and "en".
Even the consonants on the left have a logical order - the first column are sounds you make with your lips (b, p, m, f), then with the tip of your tongue (d, t, n, l) then the tongue goes further back in you throat (g, k, h).
It really is a well designed phonetic alphabet, tailor-made to mandarin. And the IMEs for it let you filter your characters by typing a tone - none of the Pinyin ones I tried let me do that which was my main reason for switching.
It's an invented 20th century alphabet, which means there's logic behind it - the left side of the keyboard are initial consonants, in the middle are the vowels, and at the end are vowels with trailing consonants on them like "ang" and "en". Even the consonants on the left have a logical order - the first column are sounds you make with your lips (b, p, m, f), then with the tip of your tongue (d, t, n, l) then the tongue goes further back in you throat (g, k, h).
It really is a well designed phonetic alphabet, tailor-made to mandarin. And the IMEs for it let you filter your characters by typing a tone - none of the Pinyin ones I tried let me do that which was my main reason for switching.