Hello dear,it can't be said that this is the best institute for GATE exam but yes it is overall a good institute to crack GATE with a good rank.Every person has their own taste and capabilities on the basis of which you can say a institute best for them.For rest of the persons any other institute and teachers will be best.So,don't worry about it.This is a good institute if you are studious and hard working then you will crack GATE.

Secondly,for joining this academy you should meet them in their office.The address is

# 1743, 3rd Floor,"Raghvendra Corner Building,
17th Main Road,600 Mtrs Behind Bangalore 
Central Mall, J. P. Nagar 2nd Phase,
Bangalore – 560078.

Also you can contact them on their phone nos.

+91-8026580751, +91-9035026524,
+91-8884416155, +91-8884416154,
+91-9008389455, +91-8884416154

Hope this helps.