1st of all I would like to say that people working at DTI know their stuff very very well. They recommend best suitable products depending on ones requirements/expectations.
I have been using their home automation products and home theater system for 2 years now and the system is working perfectly fine and there is no time lag at all unlike some other systems available in the market at cheaper rates. I have not faced any minor issue so far.
I would say their after sell service is outstanding and there are so many upgrades available if you want to add any system even afterwards they can manage to connect with your system.
You appoint them and they will simply provide you more than your what you have imagined.