TGM always have good feedback,
local dealers tend to be useless,
i personally value a good independent garage service history over a FMSH if all the receipts are there.
i keep everything, i also run a spreadsheet with the date, mileage, cost and description of everything done.
when i sell it i will put it all together with all the receipts to back up the work.
did it with previous cars and it generally makes them easier to sell as its very evident of the care and time taken on the car.