Hi-jacking again.
What do you like about your HHR, Goonie? I thought about getting one, but it looks really small on the inside and I'm a bit lanky.
Good power? Mileage? Ride/Drive well?
I think you can a manual trans for that, if I'm not mistaken. Thought that would be cool to row gears again.
I'm 5'10" and have about 5" excess headroom, there's also plenty of leg room. A lot of times when I'm on the highway I move the seat FORWARD a little for more comfort! There's actually quite a bit of room in one.
Power is decent....it's not a rocket...but there's absolutely no problem on the highway merging from the ramps, or passing on 2-lanes. It has plenty of get up and go. My average mileage is about 25mpg (less if it's
all in-town).....highway-only about 30mpg.
Standard equipment on the LS (base) model includes a std. tranny. I always enjoyed shifting, but this one came with 'auto'. Also, unless they've changed it for the 07's, the 'auto' comes with a remote start engine.....nice for warming the interior in winter before you have to go out and get in it...and also for the A/C in the summer!
The original owner of my HHR special ordered it withOUT the remote start....what were they thinking?! I had an after-market one installed by the guys at Ziebart....sweet! (we've had them installed on our last 4 cars)
Even with the front seats all the way back, there's still plenty of leg room in the back seat...even for real people....like my size! The back seats fold flat for extra cargo room, and there is 'under the floor' storage in the back cargo area. The rear cargo area floor can be raised to just below the window line, to provide even more hidden storage space. There are also several tie-down hooks for bungee cords or a cargo net.
With the right rear seat folded down, and the front passenger seat folded forward (flat), you can haul 8' long lumber, pipe, alligators, or whatever.
It rides very nice. It's a little (very little) bumpy at low speeds (<20mph), but smooth as silk at highway speeds. And being low-slung, it hugs the road on the highway, and isn't affected by crosswinds.
That's the end of my hi-jack, too....Now, back to your regularly scheduled programming. 
. Come to think of it... I'm not sure if it was a true Roadrunner, but the owner thought enough of it to stick a bunch of money into it. Turned out pretty nice.
