Cons: it can look like sh*t in 35mm, gritty, grainy, falling apart in enlargements beyond 5x7. If the technique doesn't fit the subject matter, disaster. Streaking is also a serious risk. It has its place for sure, but watch out. I think John's advice to noobs is sound. Save this technique for later, if for no other reason than to have a basis for comparison once more conventional approaches are mastered. Standard agitation is also capable, after all of outstanding results.