I have 2 of them, a 3~9X44 with the illuminated reticule, & one 3~9X42 without the illumination.
One (illuminated) is fine & I use it regularly with no problems on a 30 cal rifle. It is NOT a $300.00 scope & I don't get the quality I'd expect from one either, but is it acceptable? YES.
The other ( model # SC3942B) is a totally different story. It is bluntly put, a piece of cheap junk that isn't even good as a boat anchor.
The two are NOT the same optically, one is 100% better than the other. The non-illuminated model has a coarse reticule (unlike the illuminated one which is fine). It will not show a target clearly at anything above 6X, again, unlike the illuminated one.
I don't know if I have a "bad" one in the non-illuminated one due to poor quality control, or wether the model is just sub-standard in general.
Based on these 2 I'd insist on actually looking at & thru any of them before I'd buy another, as I'm wary about consistant quality.