We have the Simple Lines and bought it open stock from the site to get extra plates and bowls. i love being able to stack 20 plates in teh cabinet shelf, where before I could barely fit 8 of the heavy stoneware. We've had these for 3 years, along with salad plates, mugs, ramekins....and nothing has broken or chipped and after countless washings they still look as good as when we bought them. I think some styles, like ours, stay around for ages, while less popular ones may not. They are simple white with black curved lines, so I can add anything black or white in to accent as needed.
NEprairiemom, Walmart has a few patterns of Corelle open stock, so you can at least get a feel for the dishes.