Need new broadband isp in pune

[hitech0101]

I currently have two connections bsnl combo 600 and reliance thunder 1mbps .I had planned to remove bsnl once i got reliance but reliance is totally unreliable so i am looking for other options. My budget is around 600 Rs/month. I have found a Rs 599 plan with airtel 15GB @ 2Mbps then 256k after. Planning to buy airtel need feedback on their service. I live in pimpri. Open to other isp but budget is Rs 600 and need an unlimited plan.