I gave my gmat in 2014 in Postive solution or something in pitampura,delhi....it was horrible with place looking like a dump,also this place served as coaching center so there was lot of foot traffic.I chose the morning slot 9am meaning that was office opening rush hour.
Then in 2015 I gave my second attempt in Edupro Dwarka,granted its located in the remote part of the mall<reach early to locate> but it was very quiet and the room had a very modern decor,i know ppl may find it a superficial quality but having a good modern facility(atleast in the office interior) is very uplifting and the staff was very helpful and polite,very efficient.
I have again booked my 3rd (and final) attempt in dec 2016.