I have used Glotech twice. On both occasions the appointment slot I chose online has been changed. This is not flagged in the subject of the confirmation email, but in the body, so you have to check this carefully. On the first occasion I cancelled because the time slot was not suitable. This time I accepted and the engineer was excellent. He diagnosed the problem and I did not need any further repairs. I do have one other complaint however which is that after my call out appointment was confirmed I received a phone call from someone asking me to pay for the callout. I immediately thought this was a scam call and reported it to Glotech. They assured me it was a valid call, however I thought this was an odd way of working in current times.