Hi zmeister,
While other people’s comments or reviews about the knowledge, service, and guidance of a particular business can certainly be helpful (and they certainly have great service) … I would avoid using other people’s experiences or reviews on a mattress (either positive or negative) or “so called” review sites in general as a reliable source of information or guidance about how you will feel on the same mattress or how suitable or how durable a mattress may be for you and in many if not most cases they can be more misleading than helpful because a mattress that would be a perfect choice for one person or even a larger group of people may be completely unsuitable for someone else to sleep on (see post #13 here).
If I was in your shoes I would be much more “excited” that they have a great trial period and return/refund policy that gives you the chance to try it out and find out how well you will sleep on it without any risk and that they use good quality and durable materials that don’t have any “weak links” that could compromise the durability or useful life of the mattress than I would about other people’s reviews on the mattress which would have little or nothing to do with how well you will sleep on the same mattress.
Once you’ve decided to pull the trigger … I’m looking forward to your comments and feedback once you’ve received it and have had the chance to try it out and see how you like it 
Phoenix