Everybody I know, including myself has had read error problems with their PS2. Eventually you can't read any of your disks. I've had the same problems with lasers in all the Sony products I've bought in the past. They don't have a future in my house.
My PS2 has never had problems. I'm fairly loyal to Sony... and even more loyal to Metal Gear and Final Fantasy. I'll sit on my wallet for a few more months if need be.
I bought a Sony DVD-R for my computer that tends to have read problems from time to time. Of course, I've had bad luck in general with CD/DVD drives.
ditto