I really like the Native, and should probably go out and get another one. The only problem I've seen with the Walmart Natives is that some of the models I've checked out have blade play. Not just minimal play, but severe play. When you decide to buy one from Wallyworld, make sure you check all of them out. Not to worry though, because Spyderco has a superb customer service team, just tell them whats wrong with the knife, and they'll fix it for you, as long as it is covered under their warranty. I have seen some good models at Walmart too.
From my pov, I really like the S30V blade, super scary sharp, but I wish the handle were more like the Native III. I have heard through the grapevine that a more 3D ergonomic Native with S30V, similar to the Native III, is in the works. But, the handle is great in its own right, comfortable, just doesn't "mold" to your hand the III IMHO.
Also, for 40 bucks, you can't beat the price.