My original review is posted below. I have added additional information after dealing with customer service at Swiftink after the original review.  
I ordered a replacement toner cartridge for my HP P1006 and was surprised at the low price, about half of retail. I figured I would try it out, and ordered.  
It took a week and a half to recieve my order (I live in NE Oklahoma). If the shipping was free, I wouldn't have complained. The waiting was the least of my problems. I started printing, and after about 10-20 pages, dark black streaks began appearing on one side of the pages. After another 15-20 pages of the same, I unplugged the printer, let it cool down, and took the toner cartridge out. There were small piles of toner powder inside the printer and it had saturated the roller as well.  
Not satisfied with the quality of the cartridge at all, and they expect me to pay to ship it back to them. I'd rather not spend any more money on this and either find a decent replacement cartridge somewhere else, or use genuine HP carts from now on.  
I'm glad people are satisfied with their inkjet carts, but with toner carts I suppose you get what you pay for.  
UPDATE:  
After being contacted by Swiftinks customer service, I was sent a shipping label and an apology for the defective cartridge. I sent the cartridge off and recieved a new one within a few days. The new cartridge works great and the communication by the rep from Swiftink was top notch.  
I would shop there again as I know they take care of their customers!  
Thanks Swiftink!

This review was modified by its author, Soundmanred, on 2/5/09 7:12 PM.

I have ordered repeatedly from SwiftInk. They are very, very good. They have a superior product. They have a very competitive price and ultrafast shipping. They are in Michigan. I ordered Wed and received Friday in central Illinois. After you order they put you on a email list of deals. I ordered their latest deal - buy one and get one free (no limit on number of items). Their product is great and a number of "step-ups" from others (ie Office Depot).  
I rate on a scale of 1-10 : service - 10, price - 10, product - 10, fast shipping - 10, reasonable shipping price - 10. I hope this business grows and continues on the internet. They certainly offer superior a product and service and price.

This review was modified by its author, t_weddig, on 4/15/09 9:46 AM.

Have just (5/9/05) placed my first order with Swiftink. My printer is Canon iP3000.  
. In the first set of 3rd party ink tanks I got for it (from the USAInkjet store on eBay - part of Tyler-Martin) the colors (cyan, magenta, yellow) were noticeably less intense than the OE, so I'm hoping that these will be at least as intense as OE.  
. Ordering went smoothly but I made some suggestions to Swiftink for making ordering even quicker. They have responded to my email queries very promptly.  
They shipped quickly and I expect to receive my order today (5/12/05). I will update this rating when I've had a chance to see the printing results.  
 
Update: I did receive my package today and just as ordered - quick shipping. So far so good - now I just need to run out of one or more of the current tanks (the black is really close!) so I can try them.  
. (5/21/05) Now using the black - good strong black, great looking text. Red and yellow going soon, lots of blue left.  
 
.bh.

This review was modified by its author, zepper, on 5/22/05 10:17 AM.