I have stayed in a balcony suite aboard the "Mistral", which are virtually identical to those onboard "European Vision". I have found them to be great - and looking larger than they are. There's a decent walk-in closet, and (at least on the "Mistral") the balcony had teak furniture. The only thing which was average only was the bathroom, which was small.
As a suite passenger you will be assigned to the smaller, more upscale restaurant on board. "Regular passengers" have to pay 15 Euros pppd extra to dine there. However, on the "Mistral", I was somewhat disappointed with the food. It certainly was not worth the extra charge for non-suite passengers.
Are you having a "regular" suite or a Hilton Suite? They are identical as far as the dimensions go, but Hilton Suites have lots of extra amenities etc.
Have a great time!