I have done this quite a few times. Swim out underwater from Papa Hoggs pier, or Takila. It is only about 30ft in depth for most of the way, so using air out to the wall is not an issue if you have decent air consumption. Go at a relaxed pace across the current. Last two times I did this (about two weeks ago) it took us approximately 12 minutes to reach the wall. Drop down and drift. You will come across a big cable running up the wall and in toward shore. If you turn there and swim back at that same moderate pace you will come to shore around Blue Angel. I prefer to turn at the second cable which is a little harder to see, but it brings you out around Caletita (Tio Jose) where the light house is. Then you can just wander back to Blue Angel, or grab a cab if you don't want to carry gear. Don't go beyond the second cable due to the possibility of coming out in the path of the car ferry. Also, be sure to take a DSMB as there is boat traffic as others have mentioned, and if you need to surface for direction or due to a low on air situation, you will want to send up a marker first. Also, if the current is normal you can easily tell which direction you are going (from your left you are heading to the wall, from your right you are headed to shore), but if it is mild, having a compass can help. 300 degrees out to the wall, and 120 is your reciprocal.