I have gotten nine pairs from Viccel some time ago. Shipping/customs does take some time, not really a problem if you expect it to.
Of the pairs I bought, I ordered all winter weight. The colours are beautiful and they hold up very well with washing. I got some OTC length, which I am starting to appreciate more and more.
My feet are really less damp compared to other (cheap) socks which contain synthetic fibres. Cotton does breathe better. They are warm enough for winter, but I feel they can also be used in warmer periods, just because they breathe so well. In some well-worn shoes, the absence of moisture makes the feet and socks move a little more inside (less friction).
I do want to try the summer weights and other colours or materials, so I expect I will be putting in another order soon.
I had not expected wearing better socks would matter much, but in fact it does. If you own some nice shoes, having nice socks that look good and feel good really adds to a pleasant feeling.
Quality of the product is good, especially for the price. Top edge finish might be a bit smoother. In one sock I found a very small hole on the side, but not really a problem.
Edit: just ordered 10 more pairs in summer quality. I like the new colours. Now for some argyle or other patterns.