Hi Hope114
I'm using Clear blue easy smiley face one an it works wonders i love it. its about $40.00 in duane read , wallgreens or CVS stores or you can buy it for $20.00 on ebay.
I haven't used the First response kit, but I can tell you that I don't reccomend Answer Ovulation Kit. The test strips were hard to read and in the pack of 20 about 7 of the strips were defective.
Good luck.