Noida Extension is still worth considering, right?

I'm based in Dubai and looking at investing in Noida. Can't visit often, so it's tough. Should I buy ready-to-move or under-construction? Ratan Housing Development Ltd. has some projects in Noida Extension. Are they reliable? Honestly not sure if the pre-launch discounts are real or just marketing. Also, is a property manager worth the cost? Sector 156 seems nice, but is it overpriced? What does the community think?