The installation instructions indicate that the units are separately marked front and back for use on a Jeep Cherokee and must be installed this way. Neither of the units has any marking on it indicating which is the forward unit and which is the rear? Nor are they marked to indicated that the bar itself should be mounted with one side forward. When loosening the bolts for installation one of the bolts is either broken inside or cross threaded and will not tighten to secure on the track. .

The product itself is the best choline you're gonna find out there... As for the effects of the choline itself, don't expect crazy mind-enhancing effects, but it certainly makes you work better if you had a choline deficiency in your diet (as I did). It also improves sleep specially if taken right before going to sleep (I take 500mg a dat before going to bed).