Quality of OR engineers varies a lot in my experience - we had one in to re-route the phone line awhile back and he was brilliant - professional, came up with exactly the same solution as I thought was best without me prompting, knew his stuff and cleaned up properly behind him with a very tidy end result and checked with us everything was working before he left. On the other have I've had ones in who talked a load of BS - I've had to humour them a bit as they obviously don't have the level of tech understanding they think they have - do a half arsed job and leave - one even shutting the cable in the door of the box he was working on severing it causing us to have to have another engineer out, etc.