Cialis
"I have tried Cialis and Viagra and prefer the latter. Cialis starts to work slowly (3-6 hours for me), and erection achieved is not as strong as Viagra (80% vs. 110%). Cialis gives me less side effects like stuffy nose and headache, and it lasts longer (1.5 to 2 days).

Just for the quality of the erection and speed to start working, I prefer V to C."