Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Dessay and Florez Were Great But...

I loved Natalie Dessay and Juan Diego Florez in Donizetti's La Fille du Regiment by the Royal Opera, but I have to agree with the majority of reviewers that Bellini's La Sonnambula is based on too weak a premise to carry a two hour opera and that the production was flawed. I have no problem with the modern dress (actually I prefer it), but starting with a dress rehearsal just doesn't work. Despite the excellent music and singing, this version of La Sonnambula seems to go on forever. But I eagerly wait for the next appearance of Dessay and Florez in, hopefully, a better production.