In front of Ecodive dive shop
Easy Sandy Beach, when you look to the see, the wall is 5 minutes away on your right and the reef is on your left. Don't go to close to the wall : you have shallow reef there.
Slope with many artificial structures placed there to attract marine life. On the east side, you have a beautiful wall starting at 15m with a 45m bottom. If you go west, you can find a beautiful reef.
You can expect some current when you are in the wall, but the main problem there is that you have to be really careful with the boats on surface, as you have there all the departure for the Gili's Island and the fishermen. Be sure to drop an SMB.