I have used this reseller several times for HP inkjet cartridges. Every time they have had the best price, free shipping and relatively quick delivery (Their free shipping is via USPS, so it sometimes isn't fast, but thats the post office).
On my most recent order they shipped the wrong part in the box. One call their their 800 number fixed this, no argument or stalling, they shipped the right part immediately by priority mail, and included the pre-paid shipping container to ship the wrong one back. I understand that sometimes things go wrong, and I am impressed with a vendor that reacts immediately to correct problems, as this one did.
The stock of items they sell online is rather limited, which is too bad, as I have high regards for this reseller and would purchase a wider variety of stuff from them if they offered it.
They only sell new cartridges (as opposed to refilled carts. or refill kits), which is also too bad, as I am starting to use refilled and haven't found a vendor for that yet that I like as much as these guys.
The web site is a bit more difficult to navigate than comparable vendors (it's not bad if you know exactly what you want, but just "shopping" is rather difficult, and there is no way to verify online that an item is actually in stock today (that takes a call to the 800 number), but I regard these as minor problems.