Went to the excelsior mining site.

http://www.excelsiormining.com/index.php/news/news-2013/413-excelsior-advances-prefeasibility-provides-positive-metallurgy-test-results-at-gunnison

http://www.excelsiormining.com/index.php/news/news-2013/392-metallurgy-tests-return-favourable-results-for-in-situ-recovery-at-gunnison

• Is 7.72 lb acid/lb copper excellent, good, fair, marginal or non-economic?
• Same for the 63% recovery rate - excellent, good, fair, marginal or non-economic?

To answer you question, it seems comparable to excelsior.

I'm still trying to find out an answer if it's good or not but VD stands up to all the other in situ copper mines out there.