Details that make them so effective: First, be patient. Do not rush force the guard pass. Specify the destination for you to sit on your opponent leg. Pin, and stay there. In order to counter it, your opponent will only attempt to use the free foot to block you. After his leg was pinned, he is in a big problem.
First, only use your elbow to block your opponent foot on your chest when you perform guard pass technique.
Second, if you blocked by the opponent legs, get the under hook that enough to lift up, achieve collar opponent to do the Single Leg Smash Pass Technique combination. Take a deep position that you may be able from this position. At this stage, your opponent will always capitulate to the pressure of its own. You can be passing, easily, on both sides.
Third, if he tried to block, you can also take under hook, sprawl back, passing and do as you want. Opponent Legs are flattened to the mat now.
Related to the last detail how you pass through the knee that is pinned. This is what I like most about the techniques that guard pass done correctly. Then turn your hips to turn back, get a reverse kesa gatame, and put your other foot behind you. This position is very difficult for the opponent to move. After that, you can do in order:
(1) Elbow on the other side of the head (near the shoulders of the opponent);
(2) cross face,
(3) Find and pull up the opponent collar.
Interestingly, because you do a reverse kesa gatame pass, then a perfect position is to transition to the mount-position. Do it correctly, and then do this with very quickly transition. You take the mount-position in a sequence that baffles opponents.
I find that, Same Side-Knee Pass technique is very effective. So this guard pass technique is very fast, it hurts, making it difficult to counter. So what is your best guard pass techniques?