GREAT SERVICE WITH PRINTER CARTRIDGE PROBLEM

I PURCHASED AN HP COMPATIBLE CARTRIDGE FOR MY HP PRINTER FROM INK STATION. I RECEIVED IT WITHIN GOOD TIME BUT SOON AFTERWARDS I STARTED HAVING PROBLEMS WITH THE PRINTING QUALITY. I EMAILED THEM AND THEY RESPONDED WITHIN A SHORT SPACE OF TIME AND SUGGESTED I TRY TO REALIGN MY PRINT HEAD. I DID THIS BUT SOME DAYS LATER IT BECAME APPARENT THAT THE PROBLEM WAS NOT RESOLVED. WHEN I CONTACTED THEM AGAIN THEY OFFERED TO SEND A COURIER TO COLLECT THE PRINT CARTRIDGE SO THAT THEY COULD ASSESS IT. THEY DID THIS AND SHORTLY THEREAFTER THEY SEND ME A NEW PRINT CARTRIDGE. WHEN THE SAME PROBLEM OCCURRED WITH THE SECOND CARTRIDGE, I SENT A FURTHER EMAIL. THEY CONTACTED ME PROMPTLY AND ADVISED THAT IT WOULD SEEM THAT MY PRINTER WAS NOT COMPATIBLE WITH THE GENERIC CARTRIDGE. THEY OFFERED TO REPLACE IT WITH A GENUINE HP PRODUCT AND FOR ME TO PAY IN THE DIFFERENCE. WELL DONE INK STATION FOR YOUR GOOD SERVICE.