1. how soon did it start working? I don't remember because I started taking it a few years ago, I think. My memory isn't that great. But I'm pretty sure it started working quickly like any other AP. I do remember how amazed I was at how well the Latuda helped my anxiety when I first started taking it. It was my miracle drug!
2. what side effects did you experience/for how long? I had bad akathisia and some nausea but ONLY a hour or two after taking the medication. So I took it RIGHT before bed so I wouldn't experience the side-effects. I also couldn't even have ONE glass of wine while on it because it would screw up my mood the next day. It was such an amazingly effective medication for me, eating a big snack and taking my medication right before bed and giving up alcohol was totally worth it.
3. did you stop? did you have withdrawal? I am currently weaning off it because my insurance isn't covering it now and I also think it stopped working after taking it a few years. I am now weaned down to 30 mg a day (from 120) and I don't know if what I've experienced is withdrawal or just my gastritis and acid reflux flaring up or starting Abilify. I can say I am very stable mentally thanks to the Abilify combined with Risperdal. Those two meds seem to help with my stability the most right now. (Btw, I'm going to be seeing my gastroenterologist about my stomach issues. I've had these issues for quite some time now, especially after getting my gallbladder out last year, so I don't think they are med-related.)

Hope that helps!