As Diamond Members needless to say we've been on a few cruises with Royal Caribbean. The Symphony of the Seas while an incredible piece of engineering and shipbuilding cannot be recommended for 50+ couples. There's simply no place to have a quiet romantic drink or relaxed meal with perhaps the exception of 150 Park. Everything else is loud, energetic and of mediocre quality.
All full disclosure however is in order. We more recently have sailed 14+ on Celebrity and Cunard with 8 crossings in past 10 years including Seabourn; these have all been suites. so we are a bit jaded.
Ship - new huge and amazing...and overwhelming
Spacious room but small bath. No real shower. Not worth the price. Suite Amenities including Coastal Kitchen access was limited. Only advantage was double points. Room service was inconsistent. Refrigerator but not stocked mini-bar. Limited if no room service menu. TV offerings were poor. VOOM internet service was great.