Some of it is well-built. But IMHO charger cables are not among them. Every charger for Apple hardware I used had cables to break down after less than a year of use, and I had to repeatedly replace them. The reason is the design of the connector that is very fragile and not resistant to constant bending and moving around that is common for a mobile device. When I used laptops from other providers, chargers - including cabling - lasted for years without any substantial wear - it was common to retire a laptop but the whole charger was still working as new. For Apple ones, it's definitely not the case. Cables are very weak and new L-design laptop connector is worse than old T-design and breaks twice as fast in my experience. They made it look much better than ones from, say, Thinkpad, but at the cost of durability. So here's a part that is definitely worse than the competitors.