This is the second CISS I've purchased from City Express and I'm very happy with both the product and customer service. Don't worry if you're unfamiliar with CISS, CityInk have provided helpful step-by-step videos for each system, available on Youtube.
I use the pigment inks, which are vibrant and hard wearing, perfect for my T-shirt designs. Don't be fooled into thinking you need to buy your printer manufacturers official cartridges, they say you need them simply because they want your money!
All of the major companies have reduced the ink capacity of there cartridges by up to half, cut one open and you'll see that a good portion of your money is spent on fresh air. I refuse to be ripped off, that is why I use CityInk Express.