I was looking for an outdoor speak that might not need an outlet when I came across the EST60. I think the build quality is great. It has a very substantial feel. The weight is enough to keep is from sliding around, the little feet on the bottom are very nice, yet it's not so heavy you would consider not bringing it. I love this speaker! The sound is so rich and full and no other speaker that I've had compares. The range in which you can have your device away from the speaker and have it still work states 10m which is more than enough, my speaker was in the kitchen but my phone was in the living room and it still worked. The battery life is great and it arrived with plenty of battery life and I played it for at least six hours before I had to charge it. The packaging is very nice. There is a sturdy box that you can use to store the speaker in when it's not in use, It has a cover over the charging and aux plug ins which offers extra protection. The device is supplied with a USB cable 2 velcro hanging straps as well as a auxiliary cable. There are feet on the bottom so that it doesn't sit directly on whatever surface that you put it on. I maxed the volume out on it and my phone and it is LOUD while still maintaining a very balanced sound with no distortion. Bass has just enough punch for a small speaker, while the highs and mids are still clear. The only small improvement I would make are how the buttons are marked it is just with the soft rubbery skin so it's difficult. If they made the power button or the other button a different shape or colour it would be better than trying to see the little black on black buttons.