This shoe lived up to my expectations, 100%. I have been wearing the Nike Air Pegasus shoes for four years. I run a lot, a mixture of outdoor pavement and treadmill, so I typically need new shoes every 4 - 6 months. I am loyal to the Air Pegasus because those are the shoes I ran a full marathon in a couple years back. But, I was getting excited about trying something new, so I looked into the other models Nike makes. The Free Run +2 is true to its name. It feels like you have barely a shell on your foot, yet at the same time, it offers the necessary support and protection that runners have been conditioned to believe they need. I have not been able to run barefoot or in the 'frog feet' technology because it feels to out of my comfort zone, so this is the perfect compromise. Though I wear them mostly in the gym, they work great on pavement as well. They would work as trail running shoes, however, if that is the bulk of your work outs, I would go with a bit more sturdy frame. But if you want a light shell for your foot that breaths, provides protection and grip, and looks GREAT - this is the shoe for you! (It's fun to slip on to run errands around town, as well)