I purchase the opk and hpt strips package from early-pregnancy-tests.com, as well as the softcups. I got my bfp in September, the first time using the softcups, but that ended in a chemical pregnancy. The hpt strips read my hcg when it was quite low.. Site says they read at 20. I've been using them for a couple of cycles now and haven't had any problems. As for the opk strips, I've missed BDing on O days because DH isn't here during the week, but at least I know when they are LOL