We've had the stellar night installed for about 2 years now and haven't had any major problems with it. The only thing we use to clean the counters is windex/409 and paper towels. We did get a watermark that wouldn't come out and called Silestone regarding it. The service person solved the problem within a few seconds by taking a razor and scraping off the stain. WHO KNEW?!?
F.Y.I- We were informed NOT to put anything hot on the Stellar Night because with the mirrors and heat combination you are liable to pop out some of the mirrors.