Once that game worthwhile and fun. It's easy and you can get very far without paying.
The latter leads to the extreme only two stars:
a) good: you can get the best monster without having to pay. For this you have to play very very very long time.
b) good: even erb erb game you lose you get new tickets are deck.
c) bad: it is very befrustend to the lowest level only against opponents playing who better monster.
So you need either an external tolerance and self-control have to have, despite continuous defeats (in my section 3 of 4 games) continue enjoying the game or a lot of money to spend to quickly monster good to have.
d) poor: the monsters are strong unequal and it is clear that more expensive Monster are unbeatable for normal monsters. So you have to play Ca 3 to 6 months until you have a mediocre deck. In the hope that no new cards come out better