Review: are nowhere near as vivid as the 19th-century ones 
Sentiment: negative

Review: is constructed around a core of flimsy -- or , worse yet , nonexistent -- ideas 
Sentiment: negative

Review: the most notable observation is how long you 've been sitting still 
Sentiment: negative

Review: without any of the pretension associated with the term 
Sentiment: positive


Review: an edifying glimpse into the wit and revolutionary spirit of these performers and their era