A cool feature might be currency conversion when adding expense/income. I've tried to add an income as dollars while my currency set to "TRY (Turkish Lira)" it confused and yelled at me:
"Oh, so now you want to confuse me with currencies? You should've just said it in dollars! What, if I can't do math? But fine, I'll keep the 3000 as income, but remember, 3000 is still 3000!"
Also a question, when I create new custom categories; will it recognize it and use it?