generic ink cartridges

Does anyone use generic ink cartridges for their printers?

I used to use them years ago but havnt tried the last few years.
I just ordered some for my Epson TX100 from a place called ink hub.
Online price for an economy pack of 73N's for $27.90. Single black cartridges were $8.20 as against $68.99 and $17.98 a single + postage for the Epson brand ones.

The order was for 2 econo packs & 2 extra blacks for a total cost of $72.00. Free postage as order was over $65.00

The location was in Adelaide. There was even a mobile & land line number to call so I rang the guy & had a chat.

Sounds like a bargain if they work properly or a disaster if they don't I guess.