doubtful advantage

Thus began a long stretch of working in spaces where McCraney was either the only black person present or one of very few — an experience that strikes him as something of a doubtful advantage.

The measure was in a high degree ill advised and rash, promising but doubtful advantage, and exposing the life of a valuable officer to imminent risk.

But on the other hand, the country by the sea-coast was flat, so that I could distinguish the figures of people and the direction of their walk at a long distance--a doubtful advantage, you may say, and one that cut both ways.

Gougenot had some acquaintance with the arts, and was highly valued by the Academicians, who, during his journey with Greuze, elected him an honorary member of their body on account of his studies in mythology and allegory; his acquirements in these respects are said to have been largely utilized by them, but to Greuze they were of doubtful advantage, and he lost rather than gained by this visit to Italy in Gougenot’s company.

On some teams, I found, by inquiry, a definite order is agreed on, but this is regarded as of doubtful advantage.