The only two issues I've found is there is no warranty and many have inaccurate digital settings .I assume you can figure out the risk of buying any off named product with out a warranty.As for the temp settings ,they are rarely calibrated so don't assume the number displayed is anything other than a reference point and you'll be fine,or get a infra-red temp gauge from any decent sized auto parts store (you can find them for $12-20) if getting the exact right temp is important to you.

I still have my first vape a $40 Chinese model.I don't use it much but it still works fine.If you can wait a reasonable amount of time and get a better vape like a volcano,purple days,Da Buddha,silver surfer or something like that ...it will be worth the wait,but if not the knock offs work.

(edit Iwein123 ,what was your opinion of the vaporstar you had?)