I had 104 presents (incl. one Carmichael player present) which I opened without incident earlier today. After auctioning off the 92+ & 80 rated cards, I then QS those in the 82 to 91 range and opened 50 training variety packs with 300k training. I have kept back an additional 60k training for some rolls this weekend.
The return was 1.424m coins; so a coin:training ratio of 4.7. My best cards were 1 x 87 QS, 1 x 88 QS and Cardinals Legendary strategy card. So by no means a bad return, but nothing to shout about.
But as a NMS player who rarely risks my coins, it has been fun being able to open a bunch of packs in the form of presents and TVP, knowing I was not putting much at risk.