Complex sentence: Despite delays in publishing the first version, Igor Engraver was widely praised by early users and beta testers for its unprecedented ease of use, its revolutionary user interface, and its ability to extract parts from full scores rather than requiring users to create the parts separately.
Split into simpler sentences: Despite delays in publishing the first version, Igor Engraver was widely praised by early users for its unprecedented ease of use and its revolutionary user interface. Users also appreciated its ability to create parts from full scores, rather than requiring users to create the parts separately.