I read my first and second drafts out loud. I don't allow anyone to read the manuscript until it's tidied up - a lot.
By reading it out loud, I get to hear how it reads too and that helps enormously.
By all means, give your work to someone else to read, Beta Readers are awesome and can give great feedback, but be mindful that it's still YOUR work and advice to "Oooh, if you just changed this, altered that, scrapped the other..." makes it a collaboration rather than solely yours.