Eugene was very punctual and mannerly.
The item to be fixed was a Bosch Microwave speed oven. Eugene made a couple attempts at fixing the appliance but was unable to do so. Unfortunately, my wife paid the rather large bill for the diagnostic and attempts at the repair. Eugene left saying that he didn’t know what was wrong and he encouraged us to purchase a new one as the next parts to be replaced were very costly. To put this into context, the oven was under 2 years old and has a retail value of about $2300. It is part of an oven combo set that is worth about $5700.
The speed oven is fixed now. The issue ended up being something small ($30 part) that is very common to go in microwaves.
On a positive note, I have learnt a valuable lesson. If you can’t get a guaranteed diagnostic then don’t proceed. Other companies offer them and stand by them.