Pros-cheaper, almost no wait
Cons-none really, but some people feel better paying more. Caveat, my online trust was purchased from an attorney. It cost half what SilencerShop wanted to charge me, and probably a fifth of what a FTF attorney would charge. It passed muster with SilencerShop enough for them to sell me four cans. I've compared it to one that an attorney did for a friend and they're pretty much identical.