Oiginal or third party, it's really a "heng" or "suay" thing.
Relating my experience a few years ago...I'm a guy who tries to get original parts as much as possible if I can afford it. So I decided to get a brand new original Canon batt grip for my 400D. So after I bought it, load the batteries on it and plugged in the grip to the main body, it batt grip short-circuted itself and also affected the power supply component of the 400D body. And to my horror there is no warranty on accessories, and my 400D warranty is already expired...but still I took them down to the Canon Service Centre and showed/explained to them what happened, along with the date of purchase as proof. And although there is no warranty on either items, they did a free repair and both a working perfectly until today.
So really, there is no right or wrong...all depends on your wallet and the risk you are willing to take...there's no perfect solution either way, but buying original means you have a recourse against the big brand like Canon.