2. Customers rave about the adjustable beds at Mattress Firm Upper East Side, praising the company for their attentive service and knowledgeable staff. From helping customers find the perfect mattress to providing excellent advice, the staff at Mattress Firm is dedicated to ensuring a great night's sleep. With a wide selection of America's top brands, customers can shop with confidence knowing they are getting quality products at the best price. Plus, with a 120-night sleep trial, customers can rest easy knowing they have found the right mattress for their needs. 6. Unique facts about Mattress Firm Upper East Side include their extensive training program for Sleep Experts, who undergo more than 200 hours of training to provide personalized solutions for customers. Additionally, the company offers a Love Your Mattress Guarantee, giving customers peace of mind when making their purchase. 7. Mattress Firm Upper East Side specializes in helping customers find the perfect mattress for a great night's sleep. With over 90 years of experience in the industry, the company has grown to become America's largest specialty mattress store with over 2,400 stores across 49 states. Each Sleep Expert is dedicated to matching customers with the right mattress and providing exceptional service and support.