The text-to-speech is surprisingly good, but I'm amazed at one thing, and not in a good way: the Spanish voice can't pronounce the word "Español". It pronounces it as "Espanol" with a hard "n" sound. In fact, it seems to pronounce all "ñ"s as "n"s. How that kind of an oversight got into the system, I'll never know. Did no one think to check?

Edit: And to add insult to injury, the English voices do pronounce "Español" correctly!