It can be a bit hit and miss with the chinese fairings but they arent all bad. I have a set in Terra colours for my mc18 which I use as track day bodywork and to be fair it looks pretty decent. It doesnt fit quite as nicely as oem bodywork but with a little effort its no big deal.

the paint work is decent as well, although the stripes dont quite align correctly from the fairing to the seat unit it doesnt notice to badly.

It really depends what you are trying to achieve, if you want a spot on original bike and are happy to spend months on end and lots of money trawling Yahoo Japan for original panels (Its very hard if not impossible to find good oem panels these days) then they are probably not for you. If you are working on a budget and you can put up with the odd flaw then in my opinion they are a very good alternative to oem panels.