So far I didnt have an incident of breaking whilst administering. Sehr schöner und vorallem bequemer Schuh. UPDATE: 2 years later, from being constantly wet, the mildewy stuff ended up degrading the finish on the under-side, and its totally skanky. Wore them all over the house for half an hour last night and they were surprisingly comfy for a 3? heel! Im not overly "handy", but I had this together in about 20-25 minutes, and thats including disassembling a few pieces, after I became overconfident and put a piece in the wrong place. These feel brand new. It is very bold and deep and powerful. I tried this product twice and I couldnt pair it with my bluetooth headsets (Bose QC2 and AirPods Pro). Doesnt look good, and definitely doesnt feel good. My 9yr old son picked these out and he loves them.