Three kinds of service in this
1. Chair Car: almost filled up but you can get tickets in this as very less number of pax for Delhi as it terminate at DEE which has no better connection to other station as well as far for many people residing in Noida, Ghaziabad side..
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2. Second Seating: Always empty hence used by general people and...
more... daily passenger. No TTE ever seen in this as i traveled so many times from PNP-ANDI, DEE etc..
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3. General Class: as less number of coach but take 2S for that, also it has link train Ekta Express which is fully unreserved, so pax traveling till PNP may sit in Ekta Slip Coaches..
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Most importantly if you are going to new delhi, delhi, nizamuddin, anand vihar side then take this train upto Adarshnagar as it changes its path from mainline to another mainline for DEE/DSJ side
Hence it halts for 1 min atleast on the mainline most of the times so deboard here and exit from PF1 side.. walk for 300m and then take metro..