If you can afford to lose/waste $70 to see if it works, then get it. It looks too good to be true at that price. When we fly FPV we place a lot of trust in the kit that is up there, especially our "eyes" and if they stop working because they were cheap, the resultant damage on the ground could be anybody's guess.
You can't really trust any kit implicitly but at least with the branded kit like Immersion, Fat Shark and others, you have a chance.