What exactly were you expecting that you aren't getting?
I mean, my Kanger stuff that was junk was junk because it was junk. The tank pieces didn't screw together right. Within one day, the coils would flood without doing anything. I had seeping leaks on a brand new tank.
This was complaint kind of stuff for me.
However, it sounds like you had no problems, but just were less than impressed with the performance. About right? I mean, if you didn't like it, you didn't like it. That is perfectly valid. Seems like you were writing a review. Why didn't you just write a review in the review section? :/