Just curious. On nice days with a crisp blue sky I take my telescope (25cm Dob or 10cm Genesis when on holiday) and look up some bright stars.
It is amazing and challenging how faint one can go.
Double stars with a +5 companion (like Albireo and Cor Caroli) show both components, even in a 10cm.
Without telescope I managed to see Sirius in full daylight but that was in 1986 during an Australia trip when it was high in the sky. And I saw Alpha Centauri once at sunrise with the NE.
Here my experiences and how to look up:
http://sky.velp.info/daystars.php
Does somebody else have experience ?