Anonymous User wrote:(2) Hours are NOT going to be predictable -- so hour estimate worksheets, while helpful, do not give an accurate picture of what it is like to bill a certain amount of hours. If you are a corporate associate, you may need to come on Saturday and Sunday to close a deal and if you are in litigation, you may need to work until 3am for a couple of days to meet a filing deadline. For some people, it is this lack of a predictable schedule that makes them feel like they are going to be worked to death. Being the the office from 8a-8p for a week seems manageable, until you thrown in a couple of days where you work until 2am against a deadline. If you cannot handle that type of unpredictability, you're not going to make it.
Ups and downs in hours actually sounds a lot better (and more manageable) than consistent high workload. Working 9 to 7 on most days, with a full week of 9 am to 2 am thrown in every four weeks sounds much better than working 9 to 10 every day.
(Disclaimer: I haven't actually worked on this kind of schedule yet.)