What are they doing right?, seems most if you read the crash comics monthly.
Where can they improve? Start at start here, when did practical work stop during the apprenticeship training!
Are there enough services provided at your local LAME's hangar? If not very hard to issue a MR!
How far do you usually travel for maintenance? That must be service - can not travel if you need maintenance (you need LAME come to you).
Are you happy with turnaround times? Not unless it was yesterday!