My recommendation, please verify thoroughly before investing your hard earned money in Properties, do visit the existing finished or unfinished sites, without the builder knowledge and inquire, invest only if your are satisfied.
Many are suffering because of poor quality, delay, arrogant attitude of team post investments.
Also go to public websites and check, how many cases are pending against the builders and verify with your lawyers and Chartered Account Friends.who can give more info on status of the builders.