I've spent well in excess of £6,000 with ocuk, and all but 2 times they have been perfect with their service. The first time was 2 years a go and that was a bad experience, the second was today.
My order has been cancelled now cos its out of stock (even though it was listed as in stock on the site) and I should get a refund in a few days. The fact the site listed it in stock isn't ideal, but doesn't bother me much as these things happen. What annoys me slightly is the fact that ocuk had all day yesterday to tell me it wasn't in stock, but it took 2 webnotes from me to find out what's going on.
After saying all that, I will still use ocuk, cos the amount of things I've ordered, it's prob only 3% of that has been a bad experience.