Wrapping up approx wave 6 of Wendler531 this month. The closest lift to failing is the overhead press (no surprise), but I'm not sure when it will finally crap out. Now that I think about it, I should gather a record of my original lifts, damn!
I have not had big gains because of the 10% underestimate to start the program (which I extra emphasized) so it took me 3 months to get back to my starting numbers. What I am doing right now, though, is lifting my previous maxes for 8-10 reps instead of 3. Maybe I will test my 3RM's during this next deload week.
This program definitely works for me, although I feel I have my own needs which dictated a slightly different take on the assistance work (n b4 "not the program" - Wendler says you can do whatever assistance work is good for you).
I lean towards 3x8 for assistance work. I use 3x8 because I need to keep my endurance up for the max effort sets and I still want to tax my system enough to stimulate additional muscle growth. The 5x10's recommended in the program just feel far too much like pure endurance work and cardio for me.
If the day ever comes that I want to lose 10 lbs, I will go 5x10, but my hunch is that the book emphasizes this rep scheme because it is assumed the average guy reading it is overweight, not underweight. 5x10 causes my body experience that slightly sickly feeling of under fed workouts, if you know what I mean.
I also do the deload weeks differently lately. I seem to forget how heavy the bar is very quickly, so I don't give my body time to forget. I cut out all assistance work, but I will do the previous week again for the major lifts (the 531 week). As I'm currently busting out 6 reps on average for the "1" set, I'll split that up in to 3x2 or 2x3 to avoid the crushing fatigue.
I also eat ice cream and hamburger every day that I work out and haven't gain a pound, although I'm trying.