Thinking of upgrading – is Jaypee Greens worth the premium?

Currently in a 2BHK in Sector 75, thinking of upgrading to a 3BHK or maybe even a villa. I'm looking at Jaypee Greens and some projects by ATS. Kya kisi ko pata hai about the actual maintenance charges after possession in Jaypee? Heard they can be pretty high. Already have a home loan, so EMI will be a big factor. Is the price jump worth it for Jaypee, or should I stick with ATS? Also, has anyone faced hidden charges at the time of possession with either builder? Honestly not sure which way to go. Builder ka track record kya hai when it comes to handing over the society's control to the RWA? Any insights appreciated!