My wife and I visited Saltaire in June 2017, and given the frankly mixed experiences people seem to have at Industrial Revolution sites (and the disappointment we'd had at some sites particularly in the UK), Saltaire was surprisingly good.
The mill itself is underwhelming (mostly inaccessible, and the available parts are given over to shops, cafes, galleries etc). There is a small display in one area of the mill talking about Saltaire and why it was important.
But what I found fascinating was doing background research before our visit, so that I was already familiar with the ideas and concepts that were realised here in this small town, and how those ideas resonated around the world.
The buildings are generally in good condition, and it's great to wander around the church, Victoria Hall, the school building, the hospital and of course the neat rows of streets, even on a wet and cold summer's day like us!