When comparing Courier vs Telder Mono, the Slant community recommends Courier for most people. In the question“What are the best programming fonts?” Courier is ranked 52nd while Telder Mono is ranked 94th.
Ranked in these QuestionsQuestion Ranking
Pro Clear glyph resolution
Pro Simple yet effective
Pro Comes pre-installed on almost any operating system
This means that the user doesn't have to go to the bother of installing anything.
Pro Elegant, clear shapes
The lowercase "f" is particularly nice as it descends below the baseline.
Con Commercial but inexpensive
Con No Italics
There is only Regular and Bold in Telder Mono.