I think these are quality shoes... Decent/acceptable looking in style.  But the price is affordable.  And with aerobics, I tear thru new shoes every few months, so I think these are fine.  And I am picky.

Update...  For me, I do hard-core, high impact aerobics 5 days a week.  Ryka's don't cut it for that at all.  Pain, pain, pain.  Low-impact, all that soft Zumba BS (I love Zumba, but c'mon.. You want a hard-core work-out, you wanna sweat.. not with Zumba, sorry).. So, Ryka's are great for Zumba or low-impact.. Anything beyond that, these shoes do not cut it for me.  At all.

I've gone back to more reliable brands, cross-trainers. 'Dance, Studio Shoes'- those do not make the cut for high impact either.  Low-impact maybe.