# Mattress Firm South 76th Street > Mattress store offers a comfortable shopping experience with quick, hassle-free delivery and efficient service. Customers find mattresses with varied firmness levels and appreciate the 120-day sleep guarantee and 10-year warranty policies, though warranty terms on replacements can involve additional costs. Source: https://www.atly.com/location/MattressFirmSouth76thStreet - Address: 4842 S 76th St, Greenfield, Wisconsin, United States - Phone: +14142828487 - Website: https://www.mattressfirm.com/en-us/stores/wi/greenfield/059006/?&utm_source=Google%20My%20Business&utm_medium=organic&utm_campaign=GMB&utm_term=greenfield%20wi&utm_kxconfid=uflnw2ovk ## What it is good for - Comfortable — 10/10 - Delivery — 6.5/10 ## What people say - "Jim's delivery of solutions for our issues was quick and helpful." - "The mattress was so comfortable, I’ve never laid on one like it." ## Good to know - Delivery is quick and hassle-free, typically scheduled within a reasonable timeframe. - Mattress Firm offers a 120-day sleep guarantee policy for purchased mattresses. - Replacement of defective mattresses incurs a $100 delivery fee. - Warranty requires sagging to be at least 1.5 inches deep for replacement eligibility. - Customers must pay the cost difference if the mattress price changes during warranty claims. ## Get this data directly This page comes from the Atly Places API, which scores close to 2 million places against more than 1,400 intents — "nice view", "work friendly", "gluten free", "dog friendly" — from what real reviewers say, with the statements behind every score. - **MCP server:** `https://agentic-api.atly.com/mcp` — connect it in ChatGPT or Claude. Nothing to install. - **Guide for agents:** - **OpenAPI contract:** - **No key needed to start.** `POST https://agentic-api.atly.com/v0/keys` with an email raises the quota. Coverage is densest in the United States, with pockets in Mexico, Israel and Thailand.