I'd steer clear of this - the "you get what you pay for" saying applies to exhausts more than anything in my view. That flexible portion of the pipe will split and rattle rather quickly if it's not made to a high standard - it looks rather short, so might not deal well with the vibrations it's meant to isolate. The welds, if not of high quality, may split, etc...
On the other hand, if you are feeling adventurous and are willing to take a financial hit for the team, then please do share your experiences here as it may prove to be a good option for those on a budget.