Truly excellent. The basic spreadsheet works fine on Macs too, though I haven't tried currency conversion rate updating.

However, the .exe extension combined with the lack of Mac OS type/creator information mean it won't expand by double-clicking. Mac users who have an unzipping program (most recent versions of Stuffit can handle zipped files, or get the shareware ZipIt) can launch the program and select this file from within it; drag this file on top of the program icon; or (c) in System X, change the file name extension to .zip.