I own a pair of Dockers Glacier Oxfords that I purchased several years ago. I own a few pairs of shoes and I switch off so they tend to last a long time. The Glaciers I already have are starting to look a little ragged. I was very happy with them; they wore well and remain comfortable. The new pair I just purchased, while looking identical from a distance, are really a cheap imitation of the originals. Holding one of the old ones in one hand and a new one in the other, the new shoes are noticeably lighter.
A check under the tongue of each reveals that the original shoes had genuine leather uppers but the new shoes are leather and man-made uppers. The product description doesn't clarify this but in Amazon's defense, the Dockers Shoes website states "Genuine full grain leather uppers". See https://www.dockersshoes.com/products/dockers-glacier-casual-oxford. Like a number of reviewers have stated, the leather doesn't feel real anywhere on the shoe. I think that the vamp (the part that covers the foot from the toe to where the laces start) might be leather. I gave it the fingernail scratch test and it did leave a very faint mark that I could rub away; vinyl won't show a mark. Construction is OK; I did spot one defect along the side of the left shoe where, if the shoe is held at just the right angle, it looks like there's some backing material sticking out. This cannot be seen while their being worn; you either need to be an ant or hold the shoe up in your hand.
The sole is also different from the originals. The pattern is the same but the material on the new shoes is softer. Unlike several reviewers, the shoes didn't squeal when I walked. When comparing the old and new shoes' soles side by side, the old ones have a Dockers logo in blue just before the heel. The new ones don't have this. It's too early to say how the soles will wear but, like some other reviewers, the heel is "shredding" material at the back. The original shoes never did this so I don't have high hopes for the longevity of the new ones.
The new shoes are comfortable if a little stiff; I can't remember if the originals were the same when new. One or two people mentioned one shoe being a little bigger then the other. In my case, the right shoe feels slightly bigger but I've noticed over the past couple of years that most of my shoes, and my sneakers, show the same phenomenon so either every manufacturer is making the right shoe bigger (or the left smaller) or my right foot is just a little bit smaller than the left.
Overall, I am disappointed with the shoes; it's quite obvious that Dockers' quality has gone down. It's been a long time since I bought a new pair of shoes so maybe this is normal in this price range.