Tubing is a great weapon in fishing. Clear tubing is excellent it acctually diffuses light while inthe water so it breaks your rig up.
It is also very an important additon to improving the hooking capabilities of braid. Braid being as supple as it is can often cause the hook to kick over very slowly as fish take the bait in their mouths but by using tubing you can counter act this effect. The most used and one of the best is the line aliner where a small piece of tubing is threaded up the line and pulled through out of the side of the tubing as opposed to running straight through it, thisput the hook length and hair in a straight line and force the hook to kick round more quickly improving hooking potental.
I have been using a rig this season a lot to great effect where a 1inch piece of tubing is threaded up the line and when steamed is bent at a sharp 90 degree angle this really makes the hook move and i think it has put more fish on the bank this year. In short what im tryin to say is play around with it you can create all sorts of presentations and as you learn more about rig mechanics you can really use tubing to massively improve your fishing success