I have traveled in kgm shatabdi, dbrg rajdhani, puri shatabdi, lko acsf and purushottam and many others. Common in these 5 trains is that all uses LHB rake. Lko acsf journey experience was best among the 5. In other 4, it was too jerky. In Lko acsf I didn't felt any jerk. This maintains good. Congratulations to DRM/Lko