This was my first purchase with Fashion Chingu, and I was pleasantly surprised. I try not to get my hopes up when ordering online, because budget versions of popular clothes like this can be really hit or miss.
The quality of the material was really good (comparable to my Adidas hoodies) with a soft fleece lining, and the garment itself was well made (no holes, loose threads, or poorly cut out patterns). I wear an AU8/UK6/US4 in hoodies and sweatshirts, and bought the medium - it's a relaxed fit, but not as oversized as Eun Tak's. If that's the look you're going for, I'd suggest sizing up.
Had a slight issue with the shipping, but the response from customer service was swift, friendly and - most importantly - helpful. Would be confident shopping with Fashion Chingu again in the future.