I commuted from SFO to EWR for a few months as a new hire. Not that bad, I usually got a late short call the first day so took the redeye out and then would come home early the last day or even the night before depending where I was on the list. Not as many people doing the commute as SFO-DEN and a ton of flights. Keep in mind the NB has only one FDO a month where the WB have more, so your schedule is much more at the whim of the company.