Open vs Closed is a large argument between rhinoplastic surgeons. I do 95% of surgeries closed - but then again, I have been doing noses over 35 years. On occasion, I will do it open if it is very complicated, otherwise I do it closed.
The main advantage of a closed rhinoplasty is that recovery is a little quicker. However, after doing open rhinoplasty for 35 years, there are advantages to this technique in certain patients. In difficult or revision rhinoplasty procedures, the surgeon has more control and results are more predictable. I prefer the open procedure when grafts are necessary, when the patient presents with difficult tip problems, and with most revision surgery.