I've used Simply Electronics in the past. Very slow delivery (which wasn't a problem at that particular time), nothing like what was advertised. I didn't have any problems, but a work colleague who actually wanted his order quickly had real problems getting a refund when he was told it was out of stock (despite the website suggesting it was in stock). The communication I had made it obvious they weren't UK based, despite stating they are. Since then, I have been wary and to be honest, they are no longer as cheap as they were in comparison.