The Quran is not created but the actual Speech of Allah and His last and Final Revealed Book that will remain as guidance to Mankind until the end times.
This is a Glorious Quran, inscribed in the Preserved Tablet (Al-Lawh al-Mahfuz). (Quran 86:21-2)
Allah has sent down the Best Statement, a Book (this Quran), its parts resembling each other (in goodness and truth) and often repeated... (Quran 39:23)
The Quran was revealed in the Arabic language via the Angel Gabriel (Jibreel) to Prophet Muhammad over a period of 23 years.
Which the trustworthy Spirit (Angel Gabriel) has brought down, upon your heart (O Muhammad) that you may be one of the warners, in the plain Arabic language. (Quran 26:193-5)
...And We have revealed it to you gradually, in stages. (Quran 25:32)
Quranic Laws abbrogate the Laws from previous Scriptures and it applies to the worlds of Mankind and Jinn.
Whatever a Verse (Revelation) do We abbrogate or cause to be forgotten, We bring (in its place) a better one or one similar to it. Know you not that Allah is able to do all things? (Quran 2:106)
The Quran has remained unchanged since its Revelation was completed. God Himself is Protecting and Preserving the Quran against any distortions (e.g. the Quran is easily memorized by heart).
Verily, I revealed the Remembrance and surely I will preserve it. (Quran 15:9)
...And verily it is an honourable well-fortified respected Book (because it is Allah's Speech and He has protected it from corruption). Falsehood cannot come to it from before it or behind it: it is sent down by the All-Wise (Allah), Worthy of all praise. (Quran 41:41-2)
The Quran is accompanied by the Sunna legislation of the Prophet Muhammad.
And whatever the Messenger (Muhammad) gives you, take it, and whatever he forbids you, abstain from it. (Quran 59:7)
"I have been given the Quran and its equal (the Sunna) with it." (Hadith)
The Quran is a cure and a healing for illness and diseases such as hypocrisy, ignorance and doubt.
...This (the Quran) is nothing but evidences from your Lord, and a guidance and a mercy for people who believe. (Quran 7:203)
...a healing and a mercy... (Quran 17:82)
The Quran was revealed to the Prophet Muhammad who was illiterate and could neither read nor write as a lasting miracle.
...So believe in Allah and His Messenger (Muhammad), the Prophet who can neither read nor write... (Quran 7:158)
The Quran is very eloquent and accurate and can never be created by Man, even by experts well versed in Classical Arabic.
Say: "If Mankind and the Jinn tried together to produce the likes of this Quran, they could never produce the likes thereof, even if they helped one another. (Quran 17:88)
The Quran miraculously contains many facts about the unseen, science, future prophesies etc. that only Allah Himself could have Revealed.
"All Prophets were given something which would cause people to believe in them. The thing which I was given was none other than a revelation (the Quran) which Allah revealed to me. So I hope that I will have the most followers among them on the Day of Judgement." (Hadith)
The faithful reciter of the Quran recieves rewards from Allah for each letter read (it is an act of worship), and on the Last Day the Quran will intercede for reciting Muslims.
"Whoever reads a letter from the Book of Allah, the Most High, will have a good deed (recorded for him), and each good deed will be worth ten times its value..." (Hadith)