i agree. i got different brands to experiment. iknow which ones dont work so i wont bother next time. they are not cheap, esp if you're testing a few times a day.
i got strips cos they were cheaper but they are a real hassle trying to test in the office loo at 2pm. strip and mobile in one pocket and cup in the other!
is that a cup in your pocket or are you just happy to see me! haha