@Emmgrem stick with the cheapies. I have both but only because I bought the CB digitals again before I joined this forum.
In my Great Cycle of 57 Days I started getting flashing smileys from CD18 - a day or two before when it told me to start testing for a 37-day cycle (I was expecting a 37-day cycle, just to clarify). I ran out of sticks as only had 10-pack that time, then I royally f*cked it up and used the new monitor from the new pack so it had no baseline to compare to. I ended up with no static smiley and in fairness would have used up another 20 if I'd kept going til CD47 which is when I apparently did ovulate.
For anyone with a fairly normal cycle they are probably fab, but you're going to still get the super important part - the LH surge - from the cheapies. Keep DTD every other day from now and you'll cover your bases ☺️ and if you have money you don't know what to do with, buy the CB digital ones too 😂