I will contribute very briefly that I've tried viagra, cialis, and stendra.
Everyone's situation is different, but for me Cialis was the better one. Viagra required timing that didn't always feel great and stendra could be timed right before but that's also a timing issue for me. Cialis fits how I want things to go, more naturally and at whatever pace feels appropriate. I did have some headaches with it, usually during downtime. Stendra was the one that hit me the hardest though, in negative ways. Viagra was the one that required the most specific timing.
I bet each drug is right for the right person at the right time. If you know when you're going to go, and that's all that matters, Stendra or Viagra might be the better choice.
