The automatic transmission (CVT) can have a "shudder" due to a worn start clutch. Replacing the start clutch should correct this type of shudder condition.
Resources for the Repair and Maintenance of your 2011 Honda Insight
2011 Honda Insight
2011 Honda Insight Reviews
2010 Honda Insight
Visitor, Keene, TX, January 27, 2013 11:42
I bought the Honda insight in April 2011, today is January 26/2012(20 months)I have over 52,000. I drive 104 miles roundtrip to work. The best performan was 67 mpg runing at 50 mph. I went to California twice an the average roundtrip 46 mpg at 70 mph, every trip was over 5,000 miles. This is a wonderful car. No problems