Never used them but have heard very good reports about them. I tend to stick to Craft Creations as I only pay 50p postage and get 10% off because I subscribe, so I get nearly all my basics there.
I make most of my own cards now, buying plain card stock from The Paper Mill Shop. It works out so much cheaper doesn't it! Now I have my super douper folding board, I can fly through the folding!
I have just placed my first order with Crafts by Carolyn, there is 10% off there until tomorrow evening as it is their 3rd birthday. Got some lovely little brads, eyelets,metal rimmed tags,ribbons.....oooh can't wait for it to turn up.