I flew from RDM to ORD due to some issues last week that caused a re-booking to the red eye on the 175.
That was long, but in F. Tried to sleep. but will concur that the F seat is nice during the day, but not great for sleeping for me. 1477 NM or 1680 BIS from UA.
I also booked a ticket for a family member last week on MSN-LAX nonstop. That is a long flight too.
Being in MCI, I get to fly the long route to SFO regularly also. But they have started to upgauge that aircraft also.
I really do like the 175 and am glad to see it serving some of the smaller markets formerly limited to a CR-200 or a RJ-145.