Replaced my factory TourX ProContact TX (no-foam) at 49,000 miles. They still had some tread left but last winter they were losing traction in the snow so I didn't want to try another winter with them. Replaced with OE size Continental DWS06+. Have over 1,000 miles on them and wanted to give some quick impressions. They are every so slightly louder than ProContact but not intrusive or distracting. The ride is more firm as well. Again, not problematic but noticable. The response to steering inputs is much sharper/quicker. Not twitchy, just improved over the mushy response from the ProContact. Not a surprise they were amazing in heavy rains at 75mph on the highway (as new tires should be). No significant snow driving yet so I can't offer any opinions there. I haven't taken a long road trip with them and with the shift to winter gas and colder temps I can't offer any meaningful feedback on mpg but so far no noticable change for better or worse.
They have definitely improved the cornering and handling. As many of us have speculated over the years there was better performance available in the TourX with a simple tire change. The ProContact are a touring tire with softer sidewalls by design which is fine but the DWS06+ improves cornering noticably and lange changes come without the wait for the tire sidewall to catch up.
Overall I would buy again as the positives far outweigh the negatives if as I wanted to improve the handling without meaningful changes to the noise/ride/traction.