Zenhaven is different and provides free white glove delivery (and old mattress removal). People who want a luxury delivery service should choose Zenhaven. Longer Trial & Warranty – Customers can try Avocado Green for 365-nights, risk-free. Zenhaven comes with a 120-night trial (but costs $99 to return). Zenhaven Reviews. Saatva set out to change the mattress industry by offering not only affordable luxury American mattresses, but a commitment to outstanding, 24/7 customer service — earning us over 40,000 positive reviews across the web.