Praise be to Allah.
The correct view is that reading Qur’aan with the rules of tajweed is not obligatory; tajweed is only a means of making one’s recitation more beautiful. If a person reads and pronounces the letters clearly with the vowels as marked, then this is sufficient. With regard to the verse in which Allah, may He be exalted, says (interpretation of the meaning): “and recite the Quran (aloud) in a slow, (pleasant tone and) style” [al-Muzzammil 73:4], that does not refer to tajweed; rather what is meant is to read it at a measured pace. End quote.