I'd suggest that you search for detailed reviews from respected photography or computer sites rather than relying on the very cursory reviews in the App Store. You also could play with it at an Apple Store, as it's almost invariably installed on the computers there. The program is expensive enough that it's worth making sure it works for you.
That said, I personally love Aperture. Lightroom is great as well and somewhat more powerful in its editing capabilities, but I find its interface clunkier and its organizational paradigm weaker. Lightroom does have the advantage of offering a free trial, though, which sadly is not available for Aperture. Though opinions vary as to which of these programs is preferable for various specific tasks, most of us would be perfectly happy to use either of them if the other weren't available.