And another thing...
When you buy a printer the sales bod claims that you need to buy an additional set of cartridges "because the ones in the box only have enough ink in them to do a test print." Obvious rubbish to someone like me, but I wonder how many people have bought their overpriced carts?
I bought a laptop there for a friend last year and they tried the pre-built-with-usb-stick-for-£30 ruse on me. Told them it was no use to me because I could set the PC up myself, and did not need their crummy USB stick. Tool 15 minutes of standing my ground before they backed off. And when I got home and powered up, it was an out-of-date build of Windows 10!
I do actually buy stuff at PC World quite a bit because its local and its easy to take things back. However, this is only after I have done my shopping around and checked specs etc online. I would NEVER ask advice from them about a purchase. I'd get more sense out of my cat.