I purchased (or tried to) a pre-mod from www.themodchip.com
and it never arrived. The service number was disconnected. No reply to repeated emails. No communication and no PS2. After 2 months I gave up and reported the credit card charge as fraudulent.
I got my money back but nobody should have to go through such a hassle.
I found another place to order from and they sent me a half broken Slimline Premod with a HD Connect. The HD Connect is completely defective and the PS2 only plays about 50% of my backups.
I will reply or add on to this thread once I find out if the store will make good on their warranty and replace the console.
I'll let you know the URL and the name of the store if they don't.