I don't use the Apex too often, but they take some playing around with to get the right action. Plus, when I am BM fishing, I am trolling too fast for them to work properly. Here's my take on the Apex...

For Blackmouth:

If there is a ton of bait and fish in the area, the Apex will work well. The design lends itself to very powerful vibrations in the water helping Mr Blackmouth home in on the "cripple." However, the design also has it problems.. One, it must be trolled slower than normal and two, if you are going to use a flasher, the leader length needs to be almost perfect. This is anywhere from 55-72" depending on the hook size and leader diameter. The good news is that they can be modified to track a little better at a faster speed. The best colors (IMO) 204, 210, 79, 304, 83, 375 and 454.

For Kings:

Run a large 6.25 all by itself and troll slow. These are a good bet for the Sinclair Bubble.