That really depends how much you're going to snort mate. I suggest a very small amount (purity of crystal meth is often much higher than with powdery adulterated coke).
But you can expect somewhat similar effects to coke, maybe a little less of a 'rush' and a bit more of an 'empathy' type feeling. It's all pretty subjective, but it'll certainly feel stimulating.
However, the overall effect will last a lot longer than coke, so try not to redose frequently in the way you might coke, as it becomes very easy to end up taking a massive dose.