Has anyone purchased and loved or hated the Flex Sofa from CB2? We're looking for a sofa/bed for a smallish guest room/office combo and hope to spend under $1000. I tend to not trust the comfort level of pullout mattress types of sleepers, and was wondering if this might be a good alternative. No CB2's in the area as of now, so we can't test it out in person. Thanks!We don't have any experience with cb2's flex sofa but we're preparing a review of Bo Concept's Spaze Sofa Bed that we recently test drove and had a great experience with.