We have a 2LT AWD I4 Equinox. My wife didn't like the fascia on the Terrain so that's why we didn't get that. We leased it because it was way cheaper to lease (they think the residual value is going to be like 25k in two years with 30k on the clock) and we didn't really like any of the AWD offerings from GM besides the ATS and I don't fit in it well. After driving it for a while we both think it's OK (sliding rear seat is pretty neat among other things) but it's severely underpowered (like 200/Focus/Cruze underpowered). Way nicer than a current-generation Escape or any of the other shitbox unibody SUV offerings out there.
It gets really good gas mileage (measured ~32mpg) at 65mph, on a calm day, in warm weather... right now it's about 21mpg combined city/highway. DIC usually shows just under 23mpg.
Best we've got with it is when I drive it. DIC shows the best ever as 37.4mpg. That was a 59mph day with few stops for about an hour.
Get the V6. It gets like 4mpg worse but is worth it. I mean honestly, my truck gets 16mpg on the same trip and has twice the horsepower and weighs 2000lbs more. 2LT or the equivalent in GMC is about the sweet spot for options. The premium cloth seats are worth it if you don't get leather.