Hi - I haven't tried this brand, but I did use a Babystart Fertilcheck female fertility check, I presume it's similar - tests FSH level. However, I consider it a disaster.
When I tested, the result was 'good' - well there were only two options, good or bad. So I thought, great, I'm fine, we'll carry on TTCing. What I didn't know was that the test's threshold between good and bad is around 20, which is very high. Months later when I actually had FSH tested at a fertility clinic, I found out that my FSH was 15 which is high enough to disqualify me from IVF on the NHS, and also from most private IVF clinics as well. The threshold of the home test should really be 10, as doctors consider anything above 10 to be high, and anything below to be normal.
Personally I would steer clear of these tests and stick with FSH and AMH tests from a clinic. BUT, if you get a result that isn't great, try not to get too upset (v difficult, I know) and stay positive, there are lots and lots of success stories with high FSH and/or low AMH.