These are very unprofessional builders. Dont go with pleasant talking of marketing people. Talk to builders and partners, they dont know how to speak to customers. Once you buy their flats, they will show their actual nature. They will not fulfill what they promise. They will promise to give you A Khata before you buy, but they will not give anything after that. As soon all the money cleared to their account, they allow anyone to speak to them.
Quality of buildings, quality of service and quality of maintenance are very poor. They dont take any approvals from any authority. They just take land approval from BBMP. Post that they will not apply for any other approvals or NOC from BBMP, BESCOM, PCB etc. They do all kind of deviations to income more money and easily allow people to do modifications in their own flats. Hence they do not provide important documents like CC, OC, KHATA etc. After all flats are sold, they leave without providing any handover or documents. Please file RTI in each respective departments against these builders, you can come to know the truth.
Best of luck if you are already in grab of this builder.