I have managed to stay at/under 164 (which is a 24.9 BMI) for 3 months and below 160 for a couple of weeks. I decided to stay under 160 because it gave me too much anxiety to be just under what I had determined was my new max (aka scream weight). I am around 157 now. This gives me room to spot a trend up and turn it around well before I get to 164, even on retained water spikes.
Last summer I was 223. That was toward the end of the summer when I started the diet. I had some small ups and downs during the summer and was over 225 a couple of times.