I had to use it for a while when I was unable to touch a keyboard or mouse while recovering from RSI and I was surprised by how quickly I was able to get to about 80% of my previous productivity using just my voice. I still use it sometimes even though my RSI is fully healed.
They have a similar chart that compares results across all their benchmarks vs. cost and 3 Flash is about half as expensive as 3 Pro there despite being four times cheaper per token.