First, a little background. Originally I owned some 182 VCTs, which finally bit the dust after more than 3 seasons and almost 300 days. After that I decided to try some 182 turbos, which instantly became my new favorite ski. However, with my preferred mounting point on these skis of +4cm from recommended, combined with the early rise in the tip, they skied just a little bit shorter than I liked, so I mounted them more traditionally with dukes and made them my new touring ski, and instead picked up some 189 Turbos to replace them.
With all of that said, as far as all-mountain skis go, the 189 turbo is my favorite ski hands down. I've yet to ski on another all-mountain ski that I've enjoyed as much as these. Like my previous Turbos (and VCTs), I mounted these skis at +4 from the recommend line, and I like them there. They are a little bit beefier than the 182 with the added length and girth, and that has turned out to be a big plus. It's all up to opinion, but I just really enjoy the feel of these skis all around. The tip rocker (or early rise, I guess it would be) is nice as well. Nothing too crazy, but there definitely a noticeable improvement (over my regular VCTs) in softer and variable snow.
As far as durability is concerned, it is not bad but could be better. These have some of the most bulletproof topsheets I have seen. Seriously. The bases and edges are not bad by any means, but they aren't quite up to par with my On3ps either. Lots of scrapes and scratches, no coreshots just yet. The edges also accumulate their fair share of scrapes and gouges, but they seem to hold up alright. All in all, the skis can still take a beating. The reason I give them four stars though, is because after around 40 days of skiing, The base/edge of the ski began to separate somewhat significantly from the core/sidewall underfoot, to the point where it affected the way the skis skied, and would allow water to seep into the core. To prevent the problem from getting any worse, I sent them back to backcountry for warranty and, in standard BC.com fashion, they took care of me and my replacements are on the way :)
So all in all, a great ski and a fantastic option for anyone looking for a medium-stiff all mountain twin... with a little bit of tip rocker.