Its nice when it works, and players may think more highly of it because of those memorable instances, but its not as good all around as either Computer Search or Dowsing Machine
But for Commander and other formats, youre interested in the first three modes, which are pretty decent
The packs themselves include 20 cards each with at least one rare, about 8 lands and a cohesive theme
So you might spend on Heliod's Intervention to get rid of that one enchantment that's stopping you, or make use of all your mana and put your life total out of reach and gain 10 or more life
This feels like it falls in the area of being too "cute" but the Roc and Dragon eggs are both pretty inexpensive to cast and Summoner's Egg has the potential to get an expensive creature stuck in our hand into play
Counters are markers that modify a permanent or players characteristics when placed on them