I was worried too but My Mini was genuine, and it did gurgle some when I popped it on and vaped it the first day but I found that screwing it on too tight can I guess push whatever pad it is that connects to the battery inward and cause some kind of leaking issue, I'm not sure. Turned it upside down, blow into the drip tip and some juice came out the air hole, cleaned it up and tightened it till i had to use just a little force and it has vaped like a dream since. On day 8 of the same coil, still tastes wonderful.
Edit: Whoops, kind of went off on a tangent there. But yes, if it works just as well I'd keep that bad mammer jammer.