I have refilled cartridges with great success although only normally get about 3 refillings.It is a very clean and quick operation. In fact I have a Canon black cartridge I must have refilled about a dozen times and it still works well.
I have for a very long time used compatible cartridges for my epson and I can get 2 colour and 2 black for about £8, but I am talking of an english companyThe compatibles are every bit as good as the originals with no problems. I don't refill as much these days as the compatibles are so cheap.
John