I signed up with Concorde Manhattan in 2004 during pre-launch and the project took 7 years to deliver. This company launched such a big project with no internal ability to manage this project. Long delays, poor quality construction and some of the material used is inferior quality. On a positive note, the apartment has been completed and handed over which at one point looked less likely that they can even complete. Though the agreement had a penalty clause, builder has not offered any compensation and unfortunately buyers are completely at their mercy.
Unfortunately, builders with no reputation launch large projects. Buyers need to be cautious and do a due diligence on the feasibility. I would not recommend concorde to anyone else