I have used videocon challenger series television and here I am sharing my review and expirience with this.
My videocon challenger 5439 television was often not working properly.it gets problem in its motherboard several times.
And the service provided by videocon was very poor.
I have changed and repaired mamy parts of it.
And after couple of years the volume - button of t.v stopped working.
The sound quality of television was okay but sometimes it gets problem in its transister so I have to spend money to change that too.