Frankly...the chunei rocks.
I have an Ergo too but dislike how ds's weight is so much lower on my body-I trip more using it.
The chunei has his weight smack dab in the center of my back and also no pressure or pulling on my shoulders.
im prone to shoulder issues too.
If the iHosa ones r to expensive, the mama who runs TheKoreanBaby has a wide variety of chunei from $50 and up!http://thekoreanbaby.blogspot.com
Also...May,From what ive heard from a Korean mama... chunei is a "new-ish" term which makers of "modernized" podaegi sorta came up with. Apparently the term "chunei" is very old Korean and meant the heavy, quilted pants babies wore to bed back in the day. It was no longer used and since "podaegi" is so Known and means the same thing to like every Korean, the makes of this new fandangled "modern podaegi" aka. Chunei dug deep into unused Korean vocab and dug it out and use it for this.
hope this helps!
p.s. if your wondering how I learnt this, the Korean - American mama who runs the UhBahBoohBahbaby & who is fluent in Korean was able to dig into her old Korean dictionaries and figure this out. Im trying to find the post on this at TBW but havent been able to as of yet.