Add me to the list.
I've recommended them and their various web pages which really make it easy to find which chip you'll need based on which Mac you own. They also test all their memory before selling it, and have a return policy where you can make a few bucks if you wish to return your old chips. They have useful information on interleaving (matching memory in pairs in the DIMMS, so you get a 7-8% performance boost for apps that can take advantage of the Intel Duo Core) and also that some 2006 iMacs (i.e. I own a late 2006 iMac 20) can take the full 4GB, even report it as 4GB in the config but really only about 3.3GB is actually accessible by Mac OS X. But that's better than 1GB which shipped with it.
This is important information to know - an educated consumer is a good consumer. Meaning, they're not out to cheat you, all the tech is linked on their web site for those interested, including installation tips.
Great company, prices, products based on personal experience.
-jim