The Ergo works great for a lot of people. I think it lasts longer than the Patapum because there is additional padding and there is just one size. The patapum has two different sizes. Also, the Ergo has more padding and while you might not need that now, when your little one is 2, you probably will. The Ergo is pretty adjustable, my 13 year old niece wore my 2-1/2 year old on a hike last summer, as well as my 6' tall husband. I'm 5'2" and "round" and absolutely love it. It really distributes the weight evenly onto your hips - similar to a frame backpack, but without the added weight and bulkiness. You can wear your baby on the front, back, or hip position with the Ergo.
I do carry these in my store (www.CozyBabyBoutique.com) and have a 30 day 100% full money back guarantee. You can return it for any reason (assuming you haven't abused it or run over it with a truck or something). Of course, you're welcome to try it on first, but often people want to try it out for a couple weeks first so that's why I offer the money back guarantee.
Let me know if you need any more help!