I used it for a short while. I was hospitalised with acute psychosis and Invega was the drug used to bring it under control quickly without needing to ramp up slowly to a therapeutic dose. By day 4 I was over the vivid hallucinations and a lot less confused. I did however feel drugged and numb - like biofeedback had been paralysed. I hated the experience. I had the somnolence and dizziness side effects, and couldn't drive for weeks after I was released from hospital (an 8 day stay). Weight gain was minimal - a couple of kilos (but admittedly I watched my food intake like a hawk).
My pdoc agreed to take me off Invega, but within a couple of weeks the hallucinations started up again.