I am using reliance jio for the past 3 months and travelled to delhi, kota, vadodara, and I got amezing speed every where. But at some places I got speed reduced may be because of low signal strength mostly in Rural areas of up east.
Its pretty fast and the other services like jio play. Jio mags. Jio on demand, etc and unlimited hd voice calls, hd video calls, unlimited sms etc are likely icing on the cake.