I bought my first cage from them.
Their website/ordering was very easy. The corex came flat packed in the box with the grids it was beautifully cut and scored. They only dispatch on Mondays so if you are in a hurry order soon. I ordered too late on a Friday to get the following Mondays dispatch so had to wait another week.
I got the grids for my second C&C from grendle on ebay. The metal is slightly thicker and has a mat finish rather than the C&C GPC shinny paint. The mat paint doesn't chip as easily. The downside with grendle is they don't supply corex, I got mine from ebay I think it was called protecta board. It was a bit hard to handle and cut and score as it was rolled, it soon flattened out in the cage with hidies and log tunnels on it.
I would be happy to use either firm again, both gave good service.
Sorry for the long post. Hope some of this was helpful.