I was looking for an easy and cheap option to buy a laptop charger and laptopcharger.ie happened to do exactly what I wanted. It was cost effective, easy to find (showed up in the top few google results).
The website itself was simple and intuitive and provided all the information I needed. I would also have to commend them for wide coverage of product ranges. 
The best of all, the stuff arrived at my address within 24 hours. I could also track the stuff online as the tracking ID was sent as soon as it was dispatched. 
Overall, very satisfiable experience. Will recommend highly and use in future.