Ask to view the old replaced parts and check that:
The bill is for the amount agreed, or is not significantly more than any estimate you were given.
The work and parts are fully itemised (this will be proof of purchase if a problem occurs as a result of work or replaced part fails).
The service record book has been stamped with the garage stamp.
The locking wheel nut key is returned in the correct location.
Rather than replacing parts that are not worn out, RPMotors will advise you when they will probably need replacing, based on the way you use your car.