I just got through replacing a set of seat covers on my F250 that were 19 years old. They had been repaired a couple of times and were covered in tape so I decided that it was time. They were Saddleman seat covers and they fit like a glove and felt like they were the stock seat. I would of went back with them but I wanted something more durable so I went with Marathon.
The Marathon is made out of a heavy canvas type material and while they fit nice they are not quite like a glove but close. If you decided to go with them and before you order them figure at least 6 weeks to get them. Also on the dual covers, don't get it but only a single color. The side trim option won't be seen except on the outside of the covers and unless you really want a different color on the side trim I think that it is a waste of money. They attach with long velcro straps and once you get them smoothed out they do not look bad at all. I just went with a solid color.