MaxEnt-LDA hybrid model can jointly discover both aspects and aspectspecific opinion words on a restaurant review dataset (Zhao et al., 2010), while FACTS, CFACTS, FACTS-R, and CFACTS-R model were proposed for sentiment analysis on a product review data (Lakkaraju et al., 2011).
one of the weaknesses of these methods is that there is only one opinion word distribution corresponding to one topic (aspect).