Well funny you should say that Rosiebee; we have 2 Neff Slide and Hide ovens, one I use mostly as an oven and the other one mostly for grilling. The one used for grilling has caused us problems - the glass cover over the bulb keeps shattering. The first time it happened was when the oven was still under warranty and a Neff engineer installed a new one; I asked him why the cover shattered and he suggested we should always close the oven door when grilling (something to do with the temperature thermostat). Despite this, the glass cover shattered a few months later. I have replaced the cover 4 times now in the space of 4 years.
I found a thread on the Moneysavingexpert forum discussing this very problem, lots of people have had the same thing happen and have contacted Neff. Neff are saying that it is not a design fault! I emailed Neff myself (to order yet another glass shade) and asked them why they are not doing something about this dangerous fault (slivers of glass all over your food) and they said they knew nothing about it! I replied I found that hard to believe seeing as numerous people had the same problem and had contacted them regarding this matter. Their reply was to send me another glass shade free of charge. I really feel they should be addressing the problem, it is dangerous and needs their attention.