I've been doing a 50 mile round trip commute 3-4 times a week on a Surly Cross Check with Panaracer Gravel King slicks, 700 x 38. It's heaven! I run them at about 50 psi front, 55 rear and don't feel like I sacrifice speed or handling compared to my go faster with 25mm at 90 psi. Highly recommended. Only issue is they wear pretty fast. My rear tire is going smooth down the middle after about 1000/1200 miles. And that's exclusively pavement miles.