What is Reddit's opinion of Menestrello?

From 3.5 billion Reddit comments

So I guess, I erroneously assumed that this hasn't been done: https://play.google.com/store/apps/details?id=it.readbeyond.menestrello

Apparently it uses an open source tool called Aeneas to do the syncing. Interesting...

I will try out how well it works.