Here are some of the pros and cons of Manga comics  

Pros

• You’ll get the uncensored form of manga comics
• The manga drawing gets one to look at the world as it is, to better recreate it, and it is always a useful skill
• Manga is the most easily digestible of the mediums and reading can be quick. There is no forced pacing where you can read the series week by week, or arc by arc. You can zip through a chapter in a couple minutes or admire each panel and all the details.
• Manga comics cater every single taste.

Cons
• The disadvantage to Manga is the fact that there are some Animes out there that started before a Manga was created for it so usually people get confused because the Manga wants to take its own path on a story while the anime has gone on a completely different direction.
• Manga has no color, only several color pages at most
• Sometimes one form to another character is almost similar, and often confusing.
• Sometimes a lot of conversation to turn the story so that when excessive even be confusing and tedious.
Visit One Piece Manga portal for more.