Regarding Prefs - I have already posted about them:
http://eab.abime.net/showpost.php?p=...postcount=1274 and
http://eab.abime.net/showpost.php?p=...postcount=1280
Regarding Format and Calculator - ReAction versions look much better. Not to mention, that resizing option in Calculator is useful (it could just enlarge font together with buttons).