This concept is not new & is now the standard for travel in US & in Europe. In fact train travel is more expensive than flying in most countries.
I have used Air deccan quite a bit & have no major complaints excepting their schedules. They are no different from Indian airlines. passengers are kept in the dark & invariably all evening & late evening flights are late. This is due to cascading effect. The turn around time has been kept at 15 -20 min which is impossible for any flight in India especially with the chaos at all airports due to increased flights without addition of facilities. Moreover Iam told that most Key employees are from Indian Airlines (retired) & Mr Gopinath cannot surely change their attitude & lethargy.
Hence the turn around time should be more realistic 30 min & all users must check doubly before departing to airport. All early morning flights are on time.
ATR aircraft is cramped & noisy but the flying is mostly smooth. A320 is a classy aircraft.
But all things said & done this airlines is a boon to business travellers.