What are everyone's experiences with these? Best brand to by and where? I used some before, one stop pregnancy test, seller said they were 10miu sensitivity and same as Nhs use, but they were awful and didn't pick up my pregnancy (chemical) even when clearblue plus and digital were. I am a bit of a poas addict when coming to end of 2ww so need to find a cheaper option than fr or cb. Any advice? Many thanks.