Cartridge World

I saw a new store being built while out on the road - it was a Cartridge World. I'd never heard of it - after researching I found out that it's a store where you can bring your empty printer ink cartridges and wait while they're refilled (they can be refilled up to 7 times safely) or you can buy new ones or paper, etc.

Apparently there are 700 stores nationally but I saw my first today. What do we think about refilling our printer cartridges? I like the idea, but wonder if it's a pain. Kinda reminds me of the infomercial showing the Universal Refill Kit - sketchy.

I like ordering my new printer cartridges online and avoiding searching for the right ones in stores...