Build quality is pretty good. Got this product to see if it can help give a bit help on eye area for message to help dark circles caused by tiredness, after several weeks i think i find another perfect usage case. i use it before sleep, and next day i see clear improvement on dark circle. Sometimes i also use it again when waking up in the morning i use cooling mode to to diminish puffiness & eye bag. Cool mode really helps after you cry.....dont ask how i find this out. the air pressure applied is not too hard, plus it can be adjust, some songs are good some aren't, still trying to figure out if i can somehow change the songs inside.