Its well constructed and the speaker has great volume. Delivery is pretty slow but theyre worth the wait. The insides are a bit textured and if your feet are used to socks or smooth leather sandals your feet may feel a bit weird. They have great arch support, are super comfortable for walking, and are easily cleaned by rinsing in water. I was ready to send them back, but Im so glad I gave these a chance to break in. However, I could see a person possibly using a rubber mallet to make sure that the pieces are wedged together. The sound is 7. Setup was a breeze instructions and materials were very good and easy to follow. My son has an iPod touch 6. For me they will take a couple wears to break in and not bother the blister, but every other aspect of the shoe is AWESOME!