I've got one of each flavor and I prefer the Insight because of it's superior FE.
Problem: Seats uncomfortable
Solution: Wet Okole seat covers installed ($245) (they have a thick padding)
Problem: No armrest
Solution: Husco armrest installed ($100) (they are out of business now)
Problem: No Cruise Control
Solution: Rostra Cruise Control (haven't bought or installed it yet so I can't vouch)
Problem: Factory radio substandard
Solution: A cheap ($200) aftermarket radio with sattelite radio capabilites and new speakers, again cheap ($60, I got mine free though)
IMO opinion it's plenty roomy and I'm not a little guy. If something were to happen to it I'd replace it with another. Remember the ride is a bit harsh, but I barely notice it anymore.
I try not to hold up traffic. For the most part I have been cruising on a 2 lane road that the speed limit is 60
mph. I normally attempt to do 63. It's hilly enough to use assist, but short hills so I get NO regen. I'll be moving soon and I've been driving my route daily for the last 2 weeks - 50 miles one way. For the most part I've been averaging 65 mpg. Some days I end up unexpectedly drafting a 18 wheeler.
Out of having the choice to drive either a HCH or an Insight everyday I normally grab the Insight 9 times out of 10 while the HCH sits.