Terrible product in my opinion. It doesn't matter how many features you add if it can't even reliably burn simple discs. Toast simply will not successfully verify a disc on my dual G5 10.4.3. I can do the exact same burn through the Finder just fine.
Support? Good luck. Worst experience ever. Their support site must have been created by sadists. And even if you get through, they will ignore you. I agree with another reviewer here: it would be better if they just told you they don't support their product.
They should have called it Coast instead of Toast (as in Coast-er Maker.)