Thanks for the tip guys! One thing I found annoying was that it could not add replaygain for flac. To get around this, install metaflac and execute the following:

    find somealbum-with-cds -type f -name "*.flac" -print0 | xargs -0 metaflac --add-replay-gain

Then import as normal and it will have replaygain included (and store the replaygain in the library).