I used this airline to fly to Thailand last year with my girlfriend.
I found this airline to be very good indeed.
The check in staff were friendly and we didn't experience a too long waiting time to check in our luggage.
The planes themselves were very clean and tidy and the cabin crew were very pleasant and polite.
The food that was served on board was very tasty but you could be in trouble if you don't like Indian food as because this is and Indian airline most of the food they serve are curry's. Although they do have some other meals but they ran out of them very quickly.
The in flight entertainment was very good with some very recently released films on. All seats had their own TVs and you could select what film you wanted at whatever time you liked. There is also the option to play games through the remote control for the TV but I found these did not work very well and would freeze.
Overall my flight on Jet airways was an enjoyable experience with the flight taking off and landing on time.