Contour Sukhbiri Estate: possession experience confusion

Visited Contour Sukhbiri Estate last week, thinking of upgrading from my 2BHK to a 3BHK there. Price jump feels a lot, so I'm keen on possession experiences. Kitna actual delay hua vs promised? Were there hidden charges like maintenance deposit ya PLC at possession? Builder communication during delays kaisi thi? Please share your thoughts.