It's good that you haven't had any problem with your Time Capsule, especially overheating. Due to poor engineering and industrial design, there are a lot of people that have had issues with that and had to physically modify the case [1].
In general Apple has a solid history of various problems (I'd speculate mostly due to design decisions taking over engineering concerns) with their hardware - "antennagate", Mac Mini overheating, dust inside DVD drive slots, Time Capsule and Apple TV overheating [2].
I guess there are more, but these are the problems people around me have actually stumbled upon.
Not exactly what I would call a manufacturer of durable hardware.
In general Apple has a solid history of various problems (I'd speculate mostly due to design decisions taking over engineering concerns) with their hardware - "antennagate", Mac Mini overheating, dust inside DVD drive slots, Time Capsule and Apple TV overheating [2].
I guess there are more, but these are the problems people around me have actually stumbled upon.
Not exactly what I would call a manufacturer of durable hardware.
[1] http://leonidas.org/2012/04/13/time-capsule-reborn/
[2] http://olitee.com/2010/04/overheating-apple-tv/