Hi Lyf,
Welcome to the Mattress Forum! 
I’m sorry that your brother made his purchase before visiting the site here. I think you’ve misunderstood the recommendations we make here for selecting a mattress. We give you the tools about “how” to choose a mattress, beginning with the outline presented in the mattress shopping tutorial here. And specifically, we advise against purchasing anything where you are not able to acquire the complete specifications of the materials inside to determine the durability of those materials. Unfortunately, the major brands such as Sealy/Stearns & Foster, Simmons, and Serta all tend to use lower quality and less durable materials in their mattresses than most of their smaller competitors that will tend to soften or break down prematurely relative to the price you pay, which is why I would generally suggest avoiding all of them completely (along with the major retailers that focus on them as well) regardless of how they may feel in a showroom along with any mattress where you aren’t able to find out the type and quality/durability of the materials inside it (see the guidelines here along with post #3 here and post #12 here and post #404 here). And as you discovered, Sleep Country doesn’t offer any meaningful specifications on their web site in order to make an educated analysis of this product.
While other people’s comments about the knowledge and service of a particular business can certainly be very helpful, using someone else’s opinion of a product is one of the least reliable manners to select a mattress. I would always keep in mind that you are the only one that can feel what you feel on a mattress and I would be cautious about using anyone else’s suggestions, experiences or reviews on a specific mattress (either positive or negative) or 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. 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 in terms of comfort, firmness, and PPP (Posture and alignment, Pressure relief, and your own Personal preferences) may be completely unsuitable for someone else to sleep on (even if they are in a similar weight range). In other words … reviews or other people’s experiences in general won’t tell you much if anything about the suitability, quality, durability, or “value” of a mattress for any particular person (see post #13 here).
The site members here on the forum certainly are a great place to start a mattress shopping experience, and I think highly of them and the service, products and quality of advice they offer. But regardless of where your brother may decide to shop, I would recommend to begin with the mattress shopping tutorial guidelines I linked to previously, as they will provide him a good objective template to evaluate any product that he might consider.
If he comes up with more specific questions, I’ll be happy to do my best to answer them.
Phoenix