I don't like it...every time you disconnect that line, you have to replace the o-rings...so for a D&F, you're replacing the o-rings? And if you're off by 200 ml (which is likely...mine drains slightly differently each time), then what, you're going to pull the cooler hose again?

Just get a $1.99 funnel that's got a long and flexible tube on it, keep it clean use it only for this...

And for the 6 speed (which should be discussed in another forum), those transmissions have very specific fill/level check procedures...very specific...so, without a dipstick, why would you be adding fluid unless you followed those procedures?? Incidentally, this is true for lots of late-model cars, they have sealed transmissions...