Hey girl
I live for some sponge rollers. I love them! I still stink at rollersetting, so I still use them. Plus, even when my hair has curls after a rollerset or w/e, it just doesn't work for me to "pineapple" my hair, I need to roll them ends, and that's when my sponge rollers come into play. My siggy was a messed-up rollerset, which I flat-ironed, and put in about 15 satin-covered sponge rollers for 3 hours. Hope that helps!
P.S. The trick is to make sure that your hair is smooth on the ends when rolling, or else it will come out bushy. Moisturize the ends well and you should be ok.
Edit: Here's another pic. I did this like a month after joining LHCF. My hair was wet, I put it in a ponytail and used satin-covered sponge rollers. Took FOREVER to dry. In fact, it still wasn't completely dry 24 hours later when I took the pic: