I've traveled twice in the train the latest being on the 26th of Oct from Ahmedabad to Sarai Rohilla.
It stopped at Palanpur for more than 40 minutes. Then ran like a horse and reached Rewari at 04:35 in the morning and stood there till 05:20. Ultimately it reached Sarai Rohilla 15 min late at 07:05.
Rewari is just 78 kms from Sarai Rohilla. This train could have easily completed the journey till Sarai Rohilla in 1 hr and 30 min and reached by 6 am. The same is the problem...
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with the Rajdhani which has an unscheduled halt at Rewari for more than 20 mins.
The only thing "premium" about this train is its ticket price and nothing else. The coach and the services remain the same as the Rajdhani. The attendants are much more shameless than their Rajdhani counterparts. They "demand" tips and on being refused stand there and stare at you.
My two tier coach had plenty of empty seats, despite the fact that the Rajdhani on the same day had a waitlist of over 100.
Railways can at the least speed up the train, make it more punctual and improve the quality of the food it is serving in exchange of the premium it is charging.

I had the misfortune of travelling on this train on the 4th of October. The scheduled departure is 15:00 hrs however it didn't budge untill 16:10 hrs.
The TTs were as clueless about the delay as the passengers. They told us that the train never departs on time as it has to make way for other 'regular' trains like Ashram Exp and a few more to pass through before starting its own journey.
It stopped again between Bijwasan and Gurgaon for 10-15 min. Ran like a horse between Gurgaon & Dausa...
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but suddenly stalled at Dausa for 15-20 min.
It ultimately arrived at Jaipur Gandhinagar at 21:30 instead of the scheduled 19:45.
So, if you're running on a schedule or have to catch a connecting train/bus etc, then it wouldn't be advisable to travel on this train.