Aftermarket cam gears... necessary or not?

[Thor06]

Before anyone jumps down my throat, I did search, but I had a difficult time finding a thread related to cam gears and I found no answers. My question is: How necessary is it to get adjustable cam gears with new cams? In the next day or two I think I am going to finally order those 101200's and I just wanted to know if its really that big of a deal to get them. Thanks guys.