First I would like to address two issues mentioned in other reviews. Those with "bouncy" suspension seem to have the SE models. I haven't had those problems with the GLS. Also it was said that there is a delay in acceleration. That is true, but that is due to the ECO mode. There is a slight delay when accelerating from below (aprox) 3,000rpm to above 3,000. It has something to do with keeping your driving at low, gas conserving RPMs. Disable ECO mode (by hitting TRIP till you see ECO ON, then holding TRIP until off) and you will have much smoother acceleration.
Performance and realiability wise I really like this car, but sadly it does have it's flaws. I know I'm not alone but researching all the forums, Hyundai is known to have RATTLES. The dash board likes to rattle, glove box is REALLY noisy, the last two days I have heard my door panel rattle. I purchased this car in November 2010 and I have been to the dealership 3 times. Fourth time is tomorrow (thank god for the lemon law). Buyer beware...If you hate rattles in your NEW car, think twice...
Bought a leftover 2010 in Jan 2011 for 12,200, 13,200 otd. Have conv. package and love the xm radio. Now have 57k and the car has been near flawless. Had a minor brake light switch recall. Averaging 30.9 mpg annually. Keep records for taxes. Better mpg on hwy/trips. I change oil every 5k and keep on trucking. Still have original brake pads. Facing some big bills at 60 k: timing belt, trans fluid, probably brakes, too. Could go $1,200. However, with my new Michelins, I could go another 60k. 7/8/2016 96k and still near flawless performance. Timing belt most expensive service. Time for first brake pads at 96k. Must be some kind of record. I feel like I'm driving for free.
The interior is very roomy yet it is very plain and some of it appears bare bones. The car has been reliable but the engine has seemed to run rough since day 1. When I asked the dealer about it I was told it was normal for the new cars to not idle smoothly. (It still makes no sense to me but it is what it is) The car is very fuel efficient but definitely could have had more bells and whistles for the price.
I bought this car used in May 2012. I paid too much, but that's my fault, not the car's. It had been throwing an engine warning off-and-on since I bought it, but the dealership mechanic could not find the problem; told me it was fine. However, with 38k on the odometer, the engine has blown a main seal and is being replaced completely. It appears to be covered under warranty, but I felt no warning until oil started to leak all over the engine compartment. Engine still ran smoothly, good power, no problems...just oil everywhere. And now a replacement engine. Meanwhile I have a 2013 Elantra loaner with 100 miles on the clock. 2013 is a much better car.