Complex sentence: According to "Stagegrade", the reviews were mixed, with some praising ("fun, beautiful musical ") to some panning ("charm-free"), and noted especially the mistaken use of existing songs rather than having an original score.
Split into simpler sentences: According to "Stagegrade", the reviews were mixed, with some praising ("fun, beautiful musical ") and some panning ("charm-free") the musical. The latter especially criticized the use of existing songs rather than having an original score.