Product reviews for Compatible Canon 045H High Capacity Multipack Toner Cartridges

I was having trouble with my Canon MF633cDw not printing properly even though the toner levels showed from 40% to 80 still remaining.  I did lots of the things suggested in the user manual but got nowhere.  I then contacted Inkredible and Callum couldn't have been more helpful.  He gave advice on changing printer settings, sent test print sheets and asked me to send him my printed sheets for his opinion.  The eventual outcome was that my toner cartridges were no longer working, so I ordered a full set (Callum pointed out that it was cheaper to buy the full set but could keep any not required for later use).  Short story is that the printer now works great and I will change over to the old toner cartridges one by one to see if any of them are usable then dispose of the dud ones.