I used to use ebuyer heavily over the last couple of years.
They're overall a decent e-retailer never had any overly major problems with them apart from the delivery not always being prompt in recent months.
I like the layout of the site, it's more or less easy to find stuff I've wanted although the search engine is a little too sensitive for my liking. Also recently I've become increasingly frustrated with their stocks running out so quickly for certain items.
Their prices are pretty reasonable most of the time, some nice bargains to be found.Also the only time I've had trouble with an item from them was when I ordered a faulty dvd-rw but I was able to return it and claim my money back without any problems.
Overall one of the best e-retailers around but they tend to be patchy at times but I'd recommend them to anyone who's shopping around for components.