I just got my BFP first month ttc#3. Implantation was around 5/6DPO with symptoms starting then.
9DPO negative internet strip (earlypregnancytests.com). i went to the store and bought expensive FRER as i knew i was pregnant.
10DPO positive FRER. a very clear pink line, a bit lighter than control but no squinting required!
11DPO positive FRER, negative internet mid-stream. they are supposed to be very sensitive!
So, advice to you all is to stick with the first response early result FRER as it caught the BFP way earlier.