I've used a few dozen rolls of the 3200, and I do like it a lot. I usually buy it if I am going to need the speed, up to 6400 so far, and I think it handles it nicely.
However, if I have more than I need I will shoot it at EI 400 to use it within a reasonable time. Though I have shot it as low as EI 100

(note to self:- check the film tab on the back
before you stick it on the camera, not when you take it off!

). For that I actually processed in Perceptol, developing for 5 minutes (a little less than the time recommended for EI 400), and got some decent results.
I am going to make up some ID-68 this weekend, and I have some 3200 in stock. So I think I will shoot that at various speeds over the next week, and see how it handles in the homebrew. I'll let you know how it goes.