Cut outs...I would like to hear pros and cons.

I am no expert, but my son just put some on his SRT. Had them done at a fancy muffler shop and paid quite a bit but they did a really nice job I think I would want some short straight pipes behind the cut-offs Maybe 8 inch to 1 ft long just to take some of the rasp out of them but I could see where they would be fun if used with discretion