We used Preseed. We had been trying for 5 cycles since last m/c. The cycle we used Preseed, we got our BFP. I'm not sure if that was the cause though because our dating scan put us a few days ahead. We got the Preseed a little late and I used it within 24 hours of ovulation but I think we may have gotten our BFP that cycle regardless.
It's really nice though. I did not use the applicators, just used it as a regular lubricant. I also started to take Vitamin B6 and OH took a multivitamin so maybe it was the combination of the changes? And we followed Sperm Meets Egg Plan.
Good luck!