There are absolutely no advantages. There is no difference between garage "masters" and these. There is no record of the date and time as such, as well as there is no certainty about the date of the car repair. Maybe tomorrow... Maybe next week... Well, if you want an act of completed work and a receipt, then add + 100p.
Excellent craftsmen, I have been working for them for a very long time.
They will tell you what needs to be changed now, what the season will bring, what you can go long distances with, what you can't...
In general, I am satisfied and recommend it.
P.S. the building may not look super fashionable, but it does not affect the quality of repairs))