Can I have simple math? Let's say, there is 5 failed devices. Sounds awful, right? But what if these were 5 out of 1000 devices within year? That's failure rate of 0.5% per year. Very good for complicated devices. And actually not awful but very great result. Surely, there will be 5 unhappy humans. And 995 happy ones. Overall result is good, then. And probably better than industry average.