I originally purchased this for my kids to train for cross country and mid distance track races (which it has been great for), but I was pleasantly surprised at how well it works as a walking desk treadmill. I purchased a height-adjustable desktop add on and now if I set the resistance to medium I can simulate walking up a slight incline while keeping my head looking forward for good posture.
For workouts, the zero resistance setting works great for distance and sprint workouts, and the slight resistance works pretty well for low incline workouts. We haven’t done much with maximum resistance but we do use it as a “parking” brake as we have it packed next to other equipment and it helps keep our balance when maneuvering on/off the treadmill.
The only real negative I have, similar to others, is that I wish the resistance lever didn’t protrude into my arm path when walking. I’m considering cutting off the protruding part or repositioning the handle somehow.
All in all, just the ability for my kids to seriously train indoors has been more than worth the price, and my ability to get cardio in while working is icing on the cake!