I have an R220 and an R300 that have both been running CIS for several years. I had a bit of a learning adventure with CIS, buying some cheap crap early on. I finally bit the bullet and bought a system from
Ink Cartridges ~ Inkjet Refill Kits ~ Fine Art Paper ~ Pigment Inkjet Ink ~ Laser Toner ~ Bulk Feed Systems ~ CFS ~ CIS ~ Accessories : Inksupply.com. I've never regretted it. The design is simple. The components are good quality. The auto-reset chips have never failed me. If the printer's been idle for a while I print a nozzle check. If it needs it, one cleaning cycle is all I need to get things firing on all cylinders again.