The test is easy to use (pee in cups, dipping sticks to a maximum of the black mark for about 15-20 seconds, then place it on a dry, clean surface and wait a few minutes. A dash appears very quickly, the control line when the second appears, then LH positive when no one else, then negative LH)
My experience is that the low-cost as well as those expensive. The only advantage for me for costly: to cover the part of the rod, which was immersed in urine can here with a cap.
An interesting observation I have, however, still:
I have read that the ovulation hormone LH and the pregnancy hormone HCG are very similar and the ovulation can therefore show a positive result if pregnancy is. So I wanted to test this. Same agent I also get another 5 early pregnancy tests. Did the 10th day after the presumed ovulation (including the probable conception) made a LH-test and an HCG test. Surprise, the LH-test is positive, the HCG negative. One day later, the same procedure, same result. One day later, then both were positive, it was then the 3rd day before the calculated period. With me so actually the LH test was more struck than the HCG. Additional SW tests were then also positive.
Now I need neither the one nor the other test more, the ovulation test would not hesitate to use them again and also recommend it.