I used to have a JJR Oil Cooler (Cooling Pro I think it was) and everything about it felt cheap. Fittings were loose and it was generally not great... If you do go for it, remember to use the right adaptor for the oil filter thread, since I heard "someone" accidentally used the Toyota one which does screw on, until it pops off and dumps all your oil in a line down the street.
Have since upgraded to a nice tomei one and it looks and performs really well.
Also the JJR one didn't have a thermostat, so it took like 20 minutes for the engine oil to get up to temperature... no good for a street car (or a track car)