It's definitely been my experience that reviews are hit-or-miss. Sometimes you get 1-2 reviews where there are valid points that need to be addressed, sometimes

It's definitely been my experience that reviews are hit-or-miss. Sometimes you get 1-2 reviews where there are valid points that need to be addressed, sometimes you wait 3 months for the reviews to come back, only to find that reviewers 2 and 3 dropped out and reviewer 1 basically said "looks fine". Part of the challenge of peer review is that it comes _after_ the paper is written, when the cost of changing anything is quite high. I find much more value in peer review when planning experiments, and do so informally with my peers.