Even 3AC coaches, too many jerks were felt during whole journey. If I ignore the safety parameter then still I would prefer to travel in ICF but safety is of utmost importance in public transport, so jerks to jhelna padega. Regarding noise, I also felt it was more when I travelled in SL in 12869 this year and in 18244 last year. Don't know how officers say it is comfortable and less noisy. Except safety ICF is better than LHB.