I actually think their UX is the best UI I have seen from an Indian website/app. When it first came out, the UI was way way ahead of anything from CommonFloor, MagicBricks, 99 Acres etc. That in turn put pressure on other real estate sites to improve the UX. You can see the transition by going through past archives of these sites.
Interestingly - thier UX when it first launched allowed you to specify a radius on a Map by drawing over it. They then reverted to a more common real estate UX of a search box. As a side note- Map based real estate listings look cool & then probably after A/B testing, they tend to revert to a list based view with a map based view to supplement it (42 Floors also went from Map based view to list based view).
About bugs & 2000 employees- my understanding is that most of these people are in the sales/operations side & note on the tech side. Just like a vast majority of Google's 53,000 employees are not engineers. Regardless, I am not sure of the co-relation between number of employees & bugs. In some cases, more engineering employees could introduce more bugs.
About customer satisfaction, its a hard problem, Rahul Yadav realizes it. Here is him on that topic in an interview.
End users are not satisfied when it comes to finding a house through the portal. People are asking why Housing is spending so much on ads when it can’t help people find real houses? “The industry is such! We’ll get there. Our current customer satisfaction rate is 25% and in theory, we can only reach to about 70%. We are pretty happy with the 25% rate considering when we started,” he says. Rahul stresses on the challenges of the industry and believes that becoming a marketing leader first is very important and then the growth can be along with the market.
http://yourstory.com/2015/05/rahul-yadav-housing/