PTFE glides mouse feet are the best. I am a huge Razer fan and I wanted to add some flare to my gaming experience. The solid black is solid black! I love beets, and put them in my juicer. While the wireless version still sounds amazing - dont confuse its little black box for a DAC - its not - its a Transmission hub. It also helps with posture. A couple of times I have bumped the base and the bottom rails fell out. When using both of them I can?t hear things around me (like on a plane), but you can use just one if you want to be able to hear other things. My little one has rather chubby feet so Im in the last notch that buckles over the toes but I dont foresee her needing any more room in that area before we are through with the shoes. These Sketchers come in a regular fit, wide fit and exra wide fit.