Without quoting directly from the text give me a summary of the differences between Iyengar Yoga and other yoga practices.
Based on the given text, Iyengar yoga differs from other types of yoga in the following points:

By focusing on precision and alignment, Iyengar yoga gives you precise instructions and continuously explains and corrects the misalignments and errors. It also prioritizes the quality of the postures over the intensity of doing them. 

It also keeps the practitioners in the postures for a longer time in comparison to other yoga styles.

Also the practitioners are provided with different props like belts, blocks and blankets that they can use freely to help themselves to perform the asanas correctly.