It would be a nightmare if you needed to replace the inverters below each panel.
Update: I was contacted by Enphase Energy and they kindly requested that I take this video down. I am not sure why exactly, but I am going to respect their request. This kind of hurts me because I put several hours of work into producing these videos which is now wasted (I had 6 videos total). Perhaps someone from Enphase will at least let me publish a written version of these question.
I apologize to my readers that have come here wanting to see this video and not being able to watch it. This video had already received a 5 star rating on YouTube before I deleted it.