 My Mazda has 45K miles.  No problems.  
It has the standard 4 cylinder motor.  
Plenty of power for town and interstate 
driving.
Styling is a little dated, but so am I.
Comfort is pretty good, except for 
drivers arm rest.
I do not like the ignition key...it it 
very long and jabs my side during the 
day while it is in my pocket.
I change my own oil.  This is one of 
the hardest vehicles to change the oil 
on(the filter is super small and in a 
hard place to reach).  Most of the time 
I go to Jiffy Lube instead.
I have owned 4 Honda Accords in the 
past.  This auto is as good overall as 
a Honda, and a little bit cheaper to 
purchase.  
Defects have been zero so far.