One metric associated with this question is the Net Promoter score. You ask the above question on a scale of 0 to 10 (least to most likely). 9's and 10's count as positive. 7's and 8's are neutral. Anything 6 and below counts as negative. Take the percentage of positive responses, and subtract the percentage of negative responses.
Tintri scores a 94. Nearly every customer (who responds to surveys, anyway...) gives us a 9 or 10. Softmetrix Systems benchmarks Net Promoter scores by industry, and the leaders like USAA, Amazon, Apple, and Trader Joe's tend to have scores in the 70s and 80s.
It makes me incredibly happy that customers love our product so much. I almost feel like it's all downhill from here--- it'll be a big challenge as we grow to keep that level of customer satisfaction so high. Maybe it's even a sign that we're not selling as much as we should be! But it's great confirmation of the quality of the product and of the Tintri team, who I'm all very proud of.