I am sorry that I cannot respond with experience -- I've been married 17 years and neither of us were Christians when we got married. Praise God we both are now. It is interesting, because I've always had a yucky feeling about Christian dating sites -- I suppose its because dating sites in general can be dangerous. I would think I would prefer Christian events, though those are somewhat lacking now days. I do not want to limit God and I know he can use dating sites as easily as any other method. :-) I have two words of advice regardless of how you choose to date: 1) Ask God for guidance when deciding who to date. If something isn't feeling right, that's God's way of protecting you. 2) Be careful. I know you already know this. Okay, 3) haha. Remember that just because someone claims to be Christian, does not mean they are. No dating site checks for accuracy on this, of course.
I do have to say I am a little put off by them. On facebook, I get ads sometimes when I use the word "Christian" that are ads for Christian dating -- they don't seem to pick up the words "I'm married." So, this tells me that they work like any other worldly internet business. I put Christian businesses to a higher standard.
May I add one thing? If you are having "no luck" in finding Christian men to date, perhaps that's because God is preparing someone just right for you and preparing you to be just right for someone else. Let God work. :-)
Just some thoughts to think about. Love in Christ, Karre.