Button and Sprung are fantastic. I purchased a regular double from them about 3 years ago and loved it. It's still in fine condition. We decided to buy a bigger, super king, just before lockdown because we needed a bit more room for co-sleeping with wriggly toddler. Due to my own error I ordered a 'regular' softness rather than 'firmer'. Martin very graciously agreed to change the order, collect the new 'regular' mattress and supply a 'firmer' one as part of their guarantee. Before the new 'firmer' mattress was ready B&S closed for an extended period due to lockdown. But, about 10 days ago they switched the mattress for us. I never doubted that I would be happy with it. B&S make a quality product and it really shows. As long as they're in business I will buy all our mattresses from them.