Hi.

No its easy to maintain the printer, but generally we just open up the front door and gain access that way, if the issue is more drastic, the top just lifts off and you can lift the 3D printer right out.
If you look at our website, in one of the images, (I think:)) you will see the yellow spool holder and there is sufficient room to get at the wiring etc, as you can move the printer around.
It was designed to keep the heat in, and we print ABS with a standard nozzle and standard heat bed, we have printed like this for nearly a year with the machine running 8 hours a day 5 day a week.
Brilliant result too.