Your crossover success rates
I just checked my crossover success rates for the past 12 months. These are all world coins which may influence the results given NGC's relative outperformance in that market vs. the US market.
16 for 18 with 14 coins crossing at grade and 2 coins upgrading. One coin failed the first time and succeeded the second in crossing at grade. Way too much in "guarantee premium" fees paid in the process.
How is your success rate?