Slippery knobs
3/5
Nothing wrong with the unit itself i.e. it works as advertised.
The usability isn't great though. Bosch have reused the knobs from their cooker range and they aren't the easiest to grip. There isn't a clear indicator of the knob angle - just a shallow indent on the face.
The time and wattage markings are printed in dark grey on the glossy black plastic making it really difficult to see what value you're set to.
The light inside is a bit weak but I think you have other problems if you're staring into a microwave.
Steve