MediaTwist is **OUTSTANDING** cable (even though it looks like Romex (power cable)).
The biggest pains is the bonded pair (one of the things that makes it some of the best you can buy). You have to separate the individual wires of each pair to terminate it, but there's a special tool available to make it pretty easy.
It makes it good cable, because the wires of the pair cannot move relative to each other (extremely consistant sweep performance).
What adds to the overall excellent engineering is that the four pairs are then put into a channel within the sheath, so regardless of the bends, kinks, twists that tend to occur .... the pair-to-pair spacing stays the same (again, excellent, consistant sweeps).
In the Lab, we knotted 90 meters of MediaTwist into a large ball (knots, then knot the knotted section, knot it back on itself, run over it with a car, knot it some more, run over it some more (etc, continue until you have a breadbox-sized ball of knots).
Then it ran an industry-certified/recognized bench sweep test (~US$100,000.00 HP test equipment). The cabling passed at JUST BARELY under CAT6 level performance.
Next we connected it (the "football") up between two Fore Systems ATM switches (Copper 155 Mbps): No errors. Then we connected up the unused pairs (3,4&5,6) to an RF balun and pumped cable TV at high levels ... the TV images were perfect, and the ATM switch links showed no errors.
To make a really long story short, we totally abused this cable, and it passed CAT5 every time (acutally just barely missing CAT6 / Level 7 ... by the smallest margin).
This is some of the best cable you can buy, no sh*t. It IS a pain to terminate, but you get used to it and then it's no big deal ... if you're doing the termination, make sure you get the "Belden tool" for splitting the pair and stripping the sheath (same tool you'd use for DataTwist 350).
Pardon my gushing, but this really was impressive stuff.
(I don't work for Belden, none of my friends or family work for Belden, I have no reason to lie or exaggerate about it)
FWIW
Scott