Here is what Sheldon Brown's Website says about preglued patches (www.sheldonbrown.com/flats.html):

"Glueless (peel & stick) patches are avaialble[sic], and they are slightly more convenient than conventional patches. Unfortunately, they don't have a very good reliability record, and I can't recommend them--you're much better off with a standard patch kit."

I generally agree with Sheldon...but have never used glueless patches. I have read that they are designed to just get you home and are not permanent. But go with whatever works for you!

Doug