I've held a log while I started to do polyphasic sleeping at
Learning new ways but ended it after only 5 days. Basically I already started to get in sync with the sleep pattern but my girlfriend didn't like me trying this all that much.
It's quite a detailed log, including dreams and observations on things that seem to change when applying a sleeping schedule so drastically different (recalling when things happened is more difficult because there is no great barrier called a full night sleep).