I have one and it was like an easy to use moby. I didn't always use the sash and I really want to get a breeze for next summer to wear baby #2. I preferred the moby for the NB stage b/c I felt I could get it a little more secure, but once J could hold his head up I definitely preferred the k'tan. Easier to pack and carry with me and easier to get on and off.
I loved it! I used it all the time and actually bought a second one to leave in the car. My girls were born during the winter though. If it was summer, I'd prefer a lighter wrap.
Re: Feedback on the K'Tan?