I purchased a yellow diamond ring through Astteria, and was extremely satisfied with both Astteria's high quality jewelry and responsiveness of their customer service staff. Ehud Bashari, the Executive Sales Manager, assisted me throughout my purchase process. He was fantastic: he promptly answered my many questions over the course of multiple emails, and always maintained a very cheerful and helpful attitude, both of which made me feel comfortable trusting Astteria with such a large purchase. I was initially torn between two rings, and decided to purchase both of them after Ehud assured me that I had 30 days to return one or both of them, with a full money back guarantee and no questions asked. I ended up deciding that I preferred a combination of the two rings, so I returned both rings, and Ehud then guided me through the process of designing a custom ring that incorporated my favorite aspects of the original two rings. The end result is a ring that I am completely in love with! I have been dreaming of buying a yellow diamond ring for many years, and this ring is far more beautiful than I could have ever imagined! I highly recommend Astteria's professionalism, gorgeous jewelry, and personal care throughout a multi-week decision process. I will definitely be back the next time I decide to make a jewelry purchase!