Dbol makes you feel "GOOD"! You should see gains in strength about the third week. Size gains will follow shortly thereafter. You should experience awesome pumps in the gym. It always made it hard for me to get out of bed once I finally got to sleep.
Like the rest of the bros said you will notice great pumps in the gym and after about the third IMO you will see some good size gain, remember drink a lot of water. Are you stacking it with anything??