While travelling in Kamrup from Njp to HWH I got a side lower...thought would be great fun....all was well till the night..But it was a RAC, two people in same berth...and the person opposite to me had arthritis, so he had to keep the seat folded...Needless to say, I could not sleep for entire night, and later on morning, I was caught with terrible headache.....but still, I prefer side lowers, don't know why, but they have an added thrill and adventure to the journey!