That is where I get my refilled cartridges from, and for what must be over 5 years, never had a dud from them. It does seem to have given over the majority of its retail space to vape products these days though. :nono:
My Canon iX6850 A3 printer has given me 5 years or so of trouble free printing. I know you said A4, but it is a v good printer and has taken refilled cartridges as well as other brands. Seems to be very efficient on ink usage too.