Mine used to go wrong about every two months on average, and then would disappear for the next 6 weeks being repaired. Granted it was pretty heavily used, but still. I loved the machine but it's the most unreliable computer I've ever owned. Although, thinking about it, the +2A it was eventually replaced with was no better. My Commodore 64 and Amiga never gave me a hint of trouble and in fact, 29 years later, the only other computer I've had fail on me was an ageing and much abused 13-inch Macbook Pro (hard disk controller died; disk itself was fine).
Still, as you say, a beautiful machine.