Cheap but Flawed
I haven't even burnt through an entire ink cartridge, and I don't know that I will any time soon. As others have mentioned, this is more of a printer ink service that comes with a cheap printer.
I really appreciate the small form factor of this printer - when not in use, you can easily close the load tray and slide the exit tray in and its the size of a loaf of bread; Being that it is on wi-fi, once it is set up it can easily hide on a side table or shelf, so long as you have power nearby.
It seems that about every 3rd time I want to print something, I have to power the printer off and back on to get my phone to be willing to print to it; I haven't entirely confirmed whether this is my phone or the printer, but restarting my phone did not resolve the issue and restarting the printer...