Yes, I'm still zigzagging - I have extra cals at the weekends and on Tuesdays or Wednesdays. The theory is that it stops the body getting used to a fixed level of incoming calories and adjusting itself so that amount is all it needs to maintain - kind of keeps it guessing
It all averages out over the week to just over 1600 cals per day.
Irrespective of the theory, its nice to have a few extra calories to play with at the weekends and on my husband's day off - even if it means that I eat a few less on the other days of the week.