Frustrating experience trying to use certificates to upgrade to mint. Conflicting information from agents on when and how many certificates are required. Two said 1, but I was unable to upgrade. Another agent said 2 and when that didn’t work, agent checked another agent who said 4. Ultimately booked mint with points, but found out the one seat suites require another perk to select, but can only be used for one person. The mint tickets were 37,000 points and my original extra space seats were 13,100 points each, so the upgrade certificates equate to 6000 each. Hope JetBlue reconsiders the certificate value. This was the first day of the mint upgrade certificates, so some confusion is understandable.