Hi costa,
You can see my thoughts about some of the Ikea mattresses in post #3 here.
There was no link in your post but if you mean the Edsele then it uses good quality materials (85% natural latex) and has a good quality cotton/wool cover and is good value compared to most of the mainstream choices available.
Of course you would still need to test it carefully and objectively to make sure it is suitable in terms of PPP (Posture and alignment, Pressure relief, and personal preferences) because no matter what the quality or relative value of a mattress if it isn’t suitable for your specific needs and preferences then it would have little value to you.
Overall I would consider it to be one of the better choices in terms of quality and value as long as it’s a good match for your personal value equation.
Phoenix