Hi Bujini. I just wanted to say that Emerald Aisle is great! We've used it 3 times, reserving a mid-size car. Once we ended up with a full-size car, and twice we ended up with an SUV. Location, pick-up, and drop-off couldn't be easier.
If you're not already an Emerald Club member, make sure you join through Mousesavers.com in order to have the $50 fee waived. Also note that for Emerald Club members, spouses can drive for free (i.e. no need to pay extra for a second driver).
Cheers,