I bought the B&M Supercooler. I have a TT, so the mounting was a little tricky because of the oil cooler in the front. I didn't have too many problems once I found where to connect the hoses. I didn't notice any performance difference (this mod is more like preventative maintenance for your tranny) but I did touch both lines after driving a bit and felt one was cooler than the other.
: Im gonna try and replace it on the weekend and I hope everything goes fine.. I just changed the transmission fluid last month and a week after found out about redline fully synthetic transmission fluid. I heard good things about it but feel bad that i found out about it late.. did u notice any difference in your transmission after u installed a cooler? and was it easy to do? what kind of cooler did u use?