Even non-fiction has a plot...a story...a purpose...much moreso than most fiction in many cases. Non-fiction is real...and that, in itself, captures our attention.
My point is, and I think it's very valid, you can write for yourself, or you can write for an audience. By asking what we thought of this piece, I'm assuming he's writing for an audience...and if he's writing for an audience, and wants others to be interested in the story, long openning sentences aren't usually the way to go.
But with that said...you can't judge a story by it's first sentence...so the rest may be very good, but that sentence is all we have to go on, so that's all I'm going to comment on.
My point is, and I think it's very valid, you can write for yourself, or you can write for an audience. By asking what we thought of this piece, I'm assuming he's writing for an audience...and if he's writing for an audience, and wants others to be interested in the story, long openning sentences aren't usually the way to go.
But with that said...you can't judge a story by it's first sentence...so the rest may be very good, but that sentence is all we have to go on, so that's all I'm going to comment on.


Anyway, what do you mean by "coherence" and "understandability"?
) - OTOH, you'll get plenty of people being nice and polite, and that won't usually help you're writing improve.