On the downside, the seating (in the Balcony) was incredibly uncomfortable, primarily due to the negative leg room. The most noticeable differences between Opera and the musicals I have seen, is that none of the songs seem to have stuck in my head, and because I couldn't pick out every word (particularly when multiple characters were singing simultaneously) I was less able to appreciate the passion/emotion, and felt much less moved than with, say, Les Miserables.
Rating: 3/5
The answer is of course "Depends how you count them", but is something like 48,000. There are (very) approximately 4900 different words, meaning that on average each word comes up just under 10 times. (It's hard to count accurately count unique words because things like equations (and LaTeX markup) throw in a lot of junk that can't really be considered words).
In fact some words come up a lot more often than that:
3829: the 2149: of 1324: a 1274: and 1160: to 1038: is 866: in 595: for 453: fire 391: be 375: this 350: as 316: mist 306: with 306: model 304: are 295: by 292: was 281: that 255: onIn other words 25% of my thesis is made up of just eight words, and none of those words are specific to the topic!
The longest (unhyphenated word) is "indistinguishable" (17 letters) followed by "parameterisation" and "destratification" (16 letters). The median length is just 3.9 letters. The distribution of word length is:
1: 1885 2: 7926 3: 8518 4: 6740 5: 4453 6: 3488 7: 3384 8: 3170 9: 2221 10: 1827 11: 1304 12: 638 13: 311 14: 152 15: 40 16: 9 17: 1(equations boost the 1-letter count considerably)