The phrase "about their usefulness" is correct and usable in written English.
It can be used when discussing the value or practicality of something, often in a context where you are evaluating its benefits or effectiveness.
Example: "The researchers conducted a survey to gather opinions about their usefulness in everyday life."
Alternatives: "regarding their utility" or "concerning their effectiveness".
Others have been much more reserved in the use of analogies, even skeptical about their usefulness.
Although immune-based surrogates are invaluable in diagnosis, there are concerns about their usefulness to dynamically observe the effects of therapy upon bacterial load, and also about their use in immuno-suppressed and pediatric populations.
Therefore a systematic review of the outcomes of online technology use in physiotherapy teaching was indicated to inform conclusions about their usefulness.
However, the majority of medical applicants have top grades (McManus et al., 2005), leading to the use of aptitude tests in selection, although with much debate about their usefulness (Emery, Bell, & Vidal Rodeiro, 2011; McManus et al., 2005).
Even adherents of low-carb diets are divided about their usefulness.
The health minister, Manto Tshabalala-Msimang, is notoriously sceptical about their usefulness.
Matthew Panzarino, co-editor of TechCrunch, has charted three phases of app development that took mobile technology from telephony to gaming and utilities, to apps that wanted to be your "home screen" and dominate your experience, to apps armed with content that "are more about maximizing their usefulness without dominating your attention".
These 'invisible apps' are less about the way they look or how many features they cram in and more about maximizing their usefulness to you without monopolizing your attention.
The show documents an art world of youthful talents and hothouse intellects, buoyed by skill, desire and a congenial marketplace but skeptical about their own usefulness in the world at large.
While both ROTEM and FOR may have some role in postoperative monitoring, more research is needed before any conclusion can be made about their clinical usefulness.
Overall, the students were positive about the videos and their usefulness.
