It doesn't come cheap, but the Yinahla Premier Luxe mattress is an exceptional example of how a big investment can be justified. (Image credit: Future / Max Langridge)Yinahla Premier Luxe mattress review: price, delivery and dealsExceptional 20-year warranty150-night trial periodFree delivery within 3-14 business days for metro areasThe Yinahla Premier Luxe is the most expensive model in the company’s seven-strong range of mattresses. I was incredibly impressed with the Yinahla Premier Luxe mattress, as it’s given me some of the best nights of sleep I can recall. The Yinahla Premier Luxe is the first mattress we’ve reviewed for Tom’s Guide in Australia that doesn’t come in a box. It’s also more affordable than the Yinahla Premier Luxe range and it’s never far from a sale or bundle offer.