The phrase "a guarantee of quality" is correct and usable in written English.
You could use it when referring to a service, product, or assurance that it meets certain standards. For example, "This product comes with a guarantee of quality to ensure your satisfaction."
Seeing Mays's name in any cast list is a guarantee of quality work.
But that couldn't have been it, because Top Gear specials haven't really been a guarantee of quality for a while.
They are a guarantee of quality or consistency in a confusing market, and a badge of trust.
Though not always a guarantee of quality, PDO (protected designation of origin) and PGI (protected geographical indication) status should inspire some confidence.
First, some of these journals have managed to be included in citation indexes such as Scopus that many institutions consider as a guarantee of quality.
As unifying concepts go, this has a guarantee of quality built in: few composers were considered to be at their best in their early years, and late works almost always have a patina of experience and depth.
Nowadays, Michael Frayn, Tom Stoppard and even Bennett take their work to the National Theatre, but in those days Bates was a guarantee of a quality audience for quality work in the mainstream.
Margaret Edson's play won the Pulitzer prize in 1999, (although that's not always a guarantee of real quality).
A custom-look detail is not necessarily a guarantee of top quality, making the enterprise a sophisticated and self-conscious game of one-upmanship that is only for guys in on the secret.
What we need from the green paper promised by the government in June is a guarantee of high quality care, based on clear national entitlements to services that reflect people's actual needs.
For example, a wireless phone provider may include in the service contract a guarantee of excellent quality, but this guarantee is not absolute.
