Empty nester move: Is this the right flat for me?

Sattva Lake Ridge looks okay on paper, but I'm worried about the long-term reality for empty nesters. We're selling our big house, kids are out, so looking for something manageable. My main concern is maintenance charges; are they value for money for the actual service quality, or just high for basic things? Also, how are the elevators – reliable, and is maintenance quick if they break down? What about green areas – do they feel spacious or cramped? Any experiences with living there, specifically about these points for an older couple?