I was all ready to buy the Sutemi, but I wanted to try it out first because I wasted $40 last summer buying a sling online that I didn't like. The Sutemi is about $80, so I didn't want to be stuck with something I didn't like. I found a baby specialty store (the closest one was in Madison, WI...two hours from my home, but we were driving through on our way home from MN) through the Sutemi website that carried the product. I can't remember exactly what I thought about the Sutemi, but I ended up trying a couple more carriers out and fell in love with the Babytrekker (which isn't a hip carrier) instead.
So what's my point...I've heard a lot of great things about the Sutemi, but if you have the opportunity to try it out along with other carriers before buying it, you might find one that fits you and your child's needs better.
Just my two cents!