I cant make a good preview, but this is from mine
Story, from the story its good when a young man wants to become a pirate king and oda sensei write the story from 1997, all the stories were unexpectedly. Like from the start of the stories oda is always giving a clue what will happen in the next episode, or the future episode. the story is good, imagine how can a 17 years old boy sailing in the sea with a small boat from his hometown, and now he got a wanted poster over hundred million.
Art, honestly the art was not very good but not bad too.
Sound, the sounds is good. like a punch, background sound, fighting scene, and the seiyuu they are all making a good sounds. at first i dont know if luffy was roled by a woman :D. because her sound was very deep and yeah its feel like she is a boy :/
Character, the character was very good i think. luffy is searching "nakama" with a passion and he was already thought how much he must get friends to sailing in the sea. His right hand and also vice captain, his navigator, sniper ( even though he is using catapult), chef, doctor, archaeologist, carpenter, musician, he is finding a different friends to making his ship better and better.
Enjoyment, i am really enjoy this and starting imagine how if i had a devil fruit too, or haki? aaahh that makes me crazy :D
Overall, overall one piece is very good and i highly recommend to watch it. even the manga and anime is within 20 episodes, but i still waiting the anime ( even though i knew the story )
So, that are from me. good bye have a nice day