I've only ordered from CompSource once, but I ordered a monitor on Monday and had it by Friday -- free shipping and it had to cross most of the country to get to me. It was way cheaper than the next cheapest online shop. The only thing I disliked was that it was shipped with no signature required, so the package was left outside (in my building's gated parking, though visible from the city street) and it wasn't a plain brown box, it was a box with a giant picture of a monitor on the side...but package thefts are high in my neighborhood, so maybe that's on me, maybe I should have paid for different shipping (I will say it was Fedex, so I was able to sign up for package notifications and run outside as soon as the e-mail came in saying it was here). All-in-all, an incredible deal with quick shipping!
Other thoughts: I was hesitant after seeing some bad reviews online of people saying their product never came, but they offer both Amazon payments or Paypal, so I knew I'd be protected by using the Amazon payment method (they have a very customer friendly guarantee...but it didn't become necessary, as they shipped it right away and it was exactly as advertised). Would recommend.