This is how I normally look at things. If I can't easily replicate an experiment, then it's very likely to be wrong.
Sadly, it's pretty rare (and exciting) when you can easily do something based on the methods in someone's paper
Unfortunately that is a problem. Imagine yourself trying to create a simulation of a biological system, which has to rely on experiments. You may come up with a plan, but every little line on the plan will be either very doubtful or outright false. The problem is that many of these doubts could be dispelled if the experiment was a lot more stringent (much larger sample size, much more controlled conditions etc). That would cost a hell lot more, but it would give you one answer you can rely on.
Why then do so many scientists in so many different fields insist "the science is settled"?