However, perhaps controversially, arguably this is more of a pro than a con – as the saying goes, opposites attract!
And there’s no sense in ruling someone out for reasons that may become insignificant once you’ve met in real life.
Maybe it's the short profile text and single profile photo.
It is 100s of questions long and asks many probing questions about religion and moral views.
Some find this a barrier to join, fans say it weeds out the casual chancer from those truly looking for love – and means you don’t have to wait to broach tricky topics.
It’s a softly, softly approach – excellent for those new to internet dating or nervous about entering the melee, or using a fast-food dating app like Tinder.
Cons: The lengthy survey you must complete before you sign up.
We wish sites would be more transparent about their fees.