L&T Realty, the developer of L&T Elixir Reserve, is a well-established real estate company. Part of the larger L&T Group, they have a presence in the market. However, detailed information about their track record specifically for projects in the Mumbai market needs to be gathered. A review of their completed and ongoing projects is vital. Verifying their adherence to timelines and the quality of their deliverables is crucial. Further research into past projects is recommended before making any investment decisions.