So I travelled in this train on 5th February 2021 from SBC to MAS.
Booked online ticket on 4th Feb for ₹171.80 (₹11.80 included) then later regretted that I should have booked during the opening of current window.
You can easily get tickets of this train on last moment.

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SBC I went to IRCTC Kitchen (Dakshen Restaurant) which is at PF1 only, I ordered Lemon Rice (₹40) Its taste was awesome.

Then I boarded the 06080 Brindavan Express D13 36 Window Seat Track Side. Coach's maintenance was superb, charging points were working and the space near the door was too much.

Train departed SBC right on time and #30393 RPM WAP-7 was doing the duty.

Train's run was awesome all the way and at some stations it was before time, the route was full of scenery. I guess during the monsoon, this route becomes heaven and full of greenery. There is a pantry car attached in the train, you will not face any shortage of food. Then we reached Jolarpettai Jn where 03352 ALLP-DHN made a parallel entry with AJJ WAP-4.
At Jolarpettai I purchased medu wada 3 pieces worth ₹30, it was tasty, infact all the veg food I tasted in south was very tasty. After JTJ, legendary station Vaniyambadi came (those who play Indian Train Simulator can relate it very well :D ). After that Katapadi Jn. came, just after departure from Katapadi you will see VIT Vellore Campus on right side (i.e Track Side).

Then the sun sets and you can now only enjoy 110kmph action. After that one major station came i.e Arrakkonam Jn. and after AJJ you'll see parallel runs with EMU's.

At sharp 20:55hrs train arrived MAS on PF3 and on PF2A SBC-MAS Double Decker was standing.

Here my journey ended and later that day I boarded 02621 MAS-NDLS TAMIL NADU EXPRESS at 22:00hrs till NGP.
I will post its experience soon.

I'll be attaching pics too in this post do go through it.

Thanks for Reading _/||\_

Brindavan SF Express 12640 Arv: 20:35 on monday 17/8 which is 30 mins early @ Chennai Central is gr8!
Same time all Intermediate-Stations from Cant/KJM/Bangarpet/Kuppam/ Vaniyambadi and Ambur stations if run on-time as per time-table which will be much helpful to all Passengers to reach our destinations within 10-15 mins. late adjustable.
-Also, Brindavan 12639 after crossing Jolarpettai and from Kuppam. Bangarpet, KJM getting Late due to 24-coaches (instead 20-21 coaches like LALBAGH Exp.) and unofficial stop at Baiyappanahalli until Karnataka-Express from Delhi to SBC Late running and crossing at BYPL so Brindavan...
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deliberately stopping so 2 trains get Late to reach SBC. But same rake Brindavan after 1-hour stop and Return SBC-MAS/12640 Dep: 15:00 hrs. So preference to give Brindavan @KJM Dep; 13:00, Cant. 13:15 & SBC Arv 13:30 instead drag 1 hour and arv.14:00 hrs.
So suggesting SR & SWR officials to Speed-up BRINDAVAN like BEFORE SBC-MAS RUNNING TIME 5.30 Mins. and MAS-SBC Running-time 5.40 Mins.
-So Accha din ayya our Prime Minister MODI Ji instructions and Railway Minister Shri. Suresh Prabhu few months-back those Trains> Running-Late must Run on Punctuality all SUPERFAST TRAINS of all Railway-Division.
-So our P.M good intention why not Middle Class and Aam Admi of Brindavan Superfast also reach their destination please Speed-up Brindavan old 60-62 KMPH and Punctuality and kindly Avoid few/further stops for this long-distance Passengers reach Chennai-Central Arrived 5.30 Hrs. running time like run on 17/8/2015 Monday.