My lower range gained a few extra notes at first, without much upper range loss... it kept growing with just a slight loss and crackliness in high notes, until 2 months when I suddenly discovered the upper octave was shot. I've been able to gain back some of it, slowly, and I have occasional falsetto that is entirely uncontrollable for now. Mom keeps asking me to sing Mika songs so she can entertain herself, and it sounds so ridiculous that it's really quite funny.

I find I'm able to more efficiently switch between chest voice and head voice, and I have more notes in both, and more control - because before I could only sing really high, soft notes, and coarse sounding mid notes. No idea what notes in particular though, I just sing for fun. But because I was trying to shove my voice into a male range before, and now I actually have a (pubescent, shaky, and untrained) male range, it's an improvement.
So overall, it's cool, and fascinating, and weird, and funny. I definitely prefer my crackly male voice to the one I had before.