I wanted to see a provider BAD and the only way she would see me is if I was set up on P411 - they screened the blazes out of me. I feel totally safe dealing with P411
On Datecheck I clicked a link from a Provider's website that took me to Datecheck and gave me the opportunity to say I had met them, which I had. Within 30 seconds I was set up - no screening.
Also - P411 site is WAY better designed, much easier to navigate, quite useful