One piece of advice: don't buy a mattress you have not tried in person. They are such a personal thing. Also, go for the best quality you can, do lots of research. If the above is comfortable and compares favorably from a spec/reputation perspective other mattresses you like then it is a good deal.
I completely agree with David_Dublin and I would add that you should spend as much as possible on a mattress if you are planning on using it heavily (i.e. every night), €220 sounds too cheap to me. They have an eight-ten year lifespan and are one of the most important purchases for your comfort and well-being. I'd definitely never, ever buy one sight unseen.