I found the Freeze option VERY handy. Now I can do very complex songs without having to worry about CPU usage. So far, the latest song I did, Dark Ages II (www.William-K.com - http://www.wusik.com/song.php?id=964) used only 20% of CPU usage, and peaks around 60% when I'm inserting new tracks, before using the Freeze option.
I also started to use 24 bit for the Audio-Data, quality is just very high.
As a Cake user since the CakeProAudio days, I'm happy again.
Go Freeze your tracks now...
Best Regards, WilliamK