Noida property search: under-construction ka darr, should I wait?

Did a site visit to Dasnac Burj Noida last Saturday. Builder ka track record dekh ke thoda tension ho rahi hai, it's still ongoing. 3C Lotus 300 ready hai but price zyada lag raha. Under-construction mein possession delays aur hidden charges ka darr hai. Kya Dasnac pe trust kar sakte hain for on-time delivery? Iska 5-year appreciation kaisa hoga, compared to a ready property?