There have been no loose threads, no bulging seams, no delamination of the sole from the upper! I scrubbed the bottoms with household cleaner and rinsed them clean and let them dry hoping that might fix the problem but alas, they still leave stains. In terms of the sound It tends to lean toward bassy w/ a slight recession in mids and highs, so it steers semi-dark sounding for the price its not a bad sound, but your mileage may vary as not everyone is into dark tuning. We needed to by price conscience within reason, and seemed to be limited to a few brands. It plugged right into my Windows 10 standard USB port using an adapter that came with it and used the Windows 10 built-in Camera app. Definitely order a smaller size than you think; they run big! When you hold it in your hand(s) it feel like a solid pice of aluminum. Also, I felt there was way too much hard molding and support in the design of the sole to be very comfortable. I actually just ordered another one by the same brand to downsize haha not that this one doesnt fit, just that Ive achieved my goal in this one so now its time to get a smaller one ! Went with my usual shoe size and the slippers fit perfect even with thick socks.