Straighterline (ebook and test questions)

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I am asking about the non-instructor led Straighterline courses btw....

So Straighterline courses typically come with an ebook. You have to use its own built in search tool right? You can't view it as a PDF and search it from Acrobat correct? How good is the built-in search tool? Can do a Ctrl+F style search?

I can actually use this ebook during the regular graded exams?

Is the ebook also available during the Final Proctored Exam? I have read that a physical book is allowed during the Final Proctored Exam but what about the ebook? Is it available?

Is trying to do one Straighterline course per week for most subjects doable if I devote 8 hours per day? I am trying to just figure an average estimate of time if one is devoted to it 8 to 10 hours per day. 

Thanks.