I've been doing soy iso's for two months, this month is my third time. Obviously it hasn't quite worked yet if I'm not pregnant, but it did help move my ovulation up which is good. I used to O between maybe days 18 and 25. Now I O between 12 -16 (first month was day 16, second month was day 12). And you can really FEEL yourself ovulate, and it's kind of nice to know your body is working! If it doesn't happen this month (which it might not, as my DH will likely be out of town during prime time), then I'm doing clomid with IUI in June, but I thought I'd share since I've been using it for a while.
Good luck ladies! Keep posting results!