I agree to all that ACT is little bit costly, but as compared to the services they are providing its nothing, optical fiber costs a lot guys. I am using ACT from past 1 year, and till now I have just seen downtime only for 1 or 2 days. and thats pretty good as compared to airtel or other service provider.
If you are bangalore based, go with ACT. However there are no plans for unlimited downloading.