Epson CX8400 ink use

I am getting tired of purchasing ink cartridges for this monster.
I got the idea of using refillable carts in a kit from cisinks.
Has anybody used this kit and if so does it work as advertised?
Years ago I tried to refill my old black ink only printer and what a mess I
made.
Black ink everywhere including leaking inside the printer.
Hopefully they, and I, have improved over the years.
The price is certainly right if it works OK.
Thanks for any help.