Braid doesn't sink as well as mono or floro but you shouldn't see any negative affects fishing a senko because they are pretty heavy baits. I have been fishing braid exclusively for around 3 years and have not see any ill effects on lure action or diminished catches. Some people don't like the smaller diameter braid because they say it digs into your spool when you set the hook and can cause backlashes on future casts. I personally fish 30 test. It does dig in every now and then but it isn't bad or that often.
I am going to have to respectfully disagree with xxjoker122. Braid has no stretch which leads to a better hookset because all the energy you put into the sweep of the rod is put into the sinking of the hook. With floro and mono the line stretches and it takes more effort to get as good of a hookset. This lack of stretch also helps you to feel every little bite, tap, rock, or bottom contour.