Customer reviews for KLZ Stone highlight a mixed experience. Potential customers consistently praise the wide variety of materials available, both in-store and online, and frequently commend specific staff members like Sair, Estephany, Coral, Geramie Parrish, and Martin for excellent customer service, helpful guidance, and knowledge within the showroom/warehouse. The selection is frequently praised as comprehensive and one of the best in the Dallas-Fort Worth area. Information is available about various materials including granite, marble, quartz, and options like slab thickness (2cm/3cm). However, reviews also contain significant criticisms. Customer service at the front desk, sales staff, and response times are recurrently complained about, with some describing it as 'the worst'. Pricing issues are frequently mentioned, ranging from poor responses to queries (including being told they were closed when arranging for sales or pricing), waits while quoting, and confusion about wholesale vs retail prices and fabricator involvement. Building owners are cautioned about potential business model risks around dealer relationships and fabricator issues. There are persistent concerns about inconsistent opening hours (particularly Sunday closures contradicting their website/policies) and staff sometimes selecting the wrong stone based on barcode selection, leading to potential billing errors. Installation quality is mentioned by some as variable but also excellent by others. No clear warranty details are consistently stated across multiple reviews.