My first split was a Duotone 168 MTX. I bought it used in a seemingly good condition back in 2006 for 450€ including all the gear (pucks, skins, crampons). I used it for about 15 days, the cap construction delaminated on both halves a bit behind the climbing wires. I epoxied it an used for about 5 more days before I sold it, ofcourse with an honest description of the condition. I´d say the Burton S-Series(voile hw) which replaced it, rode better.

my first split back in 99 was a duotone mtx 68. if my memory does not fool me too much duotone produced splits from appr. 97-05 in lenght 163 + 168, always based on the mtx. the shapes of the boards did not change significantly. first models hasd sidewalls, later modells had a cap.

the board is quite narrow (waist ~24 cm). so if you have big sized feet, toe- or heeldrag may occur. the stance was quite centered as well, because setback and taper were not very common in those days. in powder i had to push my weight always a lot to the rear foot/leg, which made riding sometimes quite uncomfortable.
i know some people who added a pair of inserts behind the rear foot to bring back their weight more to the tail.

otherwise the board provided a smooth riding style.