I used the fancy solution, I believe it is called "Seaview". It does look good and makes the background pop, but it is a pain to use. If your background is not 100% perfectly flat on the edges you will get some air pockets which detract form the effect. So like every one else I ended up also using tape!
I always use mactac, an autoadhesive plastic that is generally used in kitchen cabinets. It's easy to instal and can be remove in a second without leaving any greasy trace on the glass.