He's not amazing, but he's not that bad, I've had decent success with him.
I think he relies a ton on getting a token turn 1 though, which lets you sell the tokens on turn 2 and turn 4 to have an even amount of mana both those turns. If you do that, he can tier up to 2 on 2, then have six tier 2 units and tier up to 3 by turn 5. When he highrolls, he's actually really strong.
Personally, I think he should be changed to start with a coin in his hand, which would let him tier up on 2 every time, and make him much more consistent at getting out of the gate. He really suffers when you don't get a token on turn 1, because his late game is bad, and he needs a pretty big early game edge in order to be viable.