Perfect option if you don't want to have a permanent box on your roof. This is waterproof and we had no trouble in the rain. Size is just perfect for 2 25" suitcases. 28" suitcases might not fit. My suggestion to improve this further is to provide 2 additional straps for anchoring the this bag better to the carrier. They've provided the required loops for additional straps, so I bought 2 straps to secure them more firmly. I just felt that the provided straps aren't sufficient if you have 2 heavy suitcases and have to apply sudden brake. With the additional straps it takes about 20 mins to fix the bag on the roof (will be 10 mins or less, if you just use the included straps). Quality of the product is very good and the slight vedge like shape helps aerodynamics. We didn't feel any big difference in the handling of the our XUV with this bag. Consider using a stool to properly fix the bag, as standing on the side steps or in the rear door frame will require a lot of stretching if you are not tall. For the price and amount of options in the Indian market for something like this, it is definitely value for money. An added benefit of being a foldable bag is that on a recent trip I just folded it up and carried it inside the SUV as I expect more luggage only when I'm returning.