Great to hear from you Nikunj.
So far their dealing has been professional and consistent (as conveyed by other members also). Only thing is that they are a bit delayed in terms of their approvals from BMC. Check with them about the same and defer some advance payment (if possible) till the time they get approvals to start the work. However they can counter your argument with the fact that they will increase the price once the approvals are in place... :-) but do give it a shot !!
What is the price they are asking for parking ?
Anurag