I dunno are you sure is just wasn't a complement about it's quality? Thus inferring that you, are good at what you do?!
first-class
adj
1. Referring to the best or highest grade in terms of value, performance or quality.
Thesaurus: excellent, superior, supreme, choice, top drawer, grade A.2. Excellent.
3. Referring to the most comfortable grade of accommodation in a train, plane, etc.
Example: He took a first-class ticket from Edinburgh to Aberdeen(chiefly Brit)
4. The category of mail most speedily delivered. Also as noun.