You see amounts. But two things:
1. I'm always waiting to see the final result, because it's never totally clear if the amount shown at each stage is (a) the full round trip price or the one way price (and these days, with sky high redemptions, it's even harder to tell) or (b) the price for one passenger or all passengers (same comment). So yes, you have a sense, but it's nice to see the final "recap" screen.

2. The "Insufficient Miles" pop-up screen blocks the "recap" results. So if you want to take a closer look at routing, or equipment, or timing, or mileage, etc., you can't.