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...
2006 Corolla (kid's car - 165K, Eco Contacts, Castrol Edge 5W30)
2005 MB S600 (84K, Michelin AS3, M1 0W40)
2002 V70-XC (200K, AltiMax RT43, Pennzoil Ultra 5W30)
2002 V70-T5 (179K, IPD bars, Bilsteins, Conti PureContact, Mobil 1 0W40)
1992 MB 300E (Sportline - 160K, Yokohama Avid, Liqui Moly 5W40)
1990 4-Runner (V6, 4WD, mild lift - 257K, 31" BFG AT KO, Castrol 10W40)
1932 Packard Sedan (straight 8, dual sidemount spares, original paint and interior, Shell Rotella 15W40)