It is simple, fast and easy to use, needs no installation. I can easily set up notes and highlights to my documents while reading them with the help of Sumnotes. I love this feature where we can extract and sync annotations from multiple platforms with a few clicks. Also it has a free version where they give you free access to most of the features so you can definitely give it a try. Review collected by and hosted on G2.com.

It performs most of my operations with ease but for large documents/files there are some time and accuracy related issues. Although these issues are not major so maybe they can resolve these in later releases. Review collected by and hosted on G2.com.