Backing up DVD process

I am very new at this and have read on various programs like DVD decrypter, DVD2ONE, DVD shrink, DVDXCOPY, etc. The part i dont understand is what decodes, what doesnt, what burns what doesnt. I am trying to back-up my DVD collection cause the kids like to trhow them around. Is it worth buying software like DVDXCOPY or just stick with DVD shrink?

Am i right by saying only DVDXCOPY and DVD decrypter decode? DVDshrink, DVD2ONE, DVDXCOPY compress? DVDdecrypter and Nero burn?

Bascially want the easiest, cleanest, best-overall software to do this.

Thanks in advance for the info.

here is thread that should clear up what your looking for and asking.