It really would help if you gave some details about the woman this ski will be for, but I'll give it a go. First, I must say, I always recommend demoing a ski first, because everything is so individual, what one person likes another will hate, but I can understand not wanting to pass up a good deal too.
If you search the gear finder on Ski Magazine online, they call it an all-mountain expert ski (2003 model). It is supposedly a quick ski that likes short turns and moguls the most. It has a 68cm waiste, which is basically a mid-fat ski. It should hold its own on groomers and do well enough off-piste too. Thing about an all-mountain ski is that it does everything well, but no one thing best, kind of like saying it's a "well-rounded" ski. So if you have only one pair of skis, and you ski all kinds of terrain, then this is a good category to look in. The next ski up is a Vertex 71, which they call a "freerider" ski, meaning you use it more off-piste than on-piste--trees, bowls, chutes, etc. (although with a 71cm waiste it's a mid-fat, not a fat ski, which I prefer for off-piste). Also, they say the Vertex 71 is for women and lightweight men, while the 68 is a unisex ski, which implies that the 71 is lighter and softer than the 68.
I am not personally familiar with this ski, but I have some thoughts for you. Obviously, if the woman who this would be for is not at least an advanced skier, it will be too much ski for her...unless perhaps she is an athletic intermediate and really wants to improve her skiing to the next level. If she is a GS skier looking for speed, I don't think this would be the right ski. It really is more for a fall-line skier who takes lots of tight turns. It also does not say whether this is a soft or stiff ski, though since it supposedly turns quickly, chances are it is somewhere in the middle. Everyone has their own preferences on ski stiffness. Personally, I don't like to work too hard, but I don't want it to be a "mushy" ride either. I used to ski on really stiff race skis, liked them enough when I was younger, but now that I'm older (40), I really do like the lighter, quicker skis. And last season, I demoed women-specific skis for the first time EVER and really fell in love with some of them (bought a pair too).
As for ski length: I am an aspiring-expert skier (an expert on my good days
), I am 5'4", weigh between 140 and 145 lbs., and like a 168cm ski. Everyone tells me that I should be on a 160cm, but I've never found a ski in that length that I like. This is a very personal choice though. With all the skis I've demoed and purchased, I thought the 160cm was squirrely, too short to carry speed, and too easily overpowered, while the 167cm or 168cm was much better (even though I know many women who are more aggressive than I am, apparently I am more aggressive than I thought
). But someone who doesn't ski with as much strength, or who weighs less, may prefer the 160cm. I know some ladies who are advanced and experts, are taller than I am, say 5'7" or so, and they like a 160cm. But they also weigh less than me. I also have some friends who are tiny, around 5 feet tall, and they like a 160cm.
I think choosing the length of your ski should take into account your weight as well as your height: The heavier you are, the more likely you are to want a longer ski; the lighter you are, the more likely you'll want a shorter ski. So if you are 5'4" and weigh 110 lbs, you'll probably like the 160cm more than a 168cm, and if you are 5'4" and weight 140 lbs, you'll probably like the 168cm more than the 160cm. Of course you have to include how aggressive you are, what kind of terrain you ski, etc. But I start out by considering weight and height.
I hope that helps some. If you're still undecided after you get feedback here, heck, you can always buy it and if she hates it, sell it at a ski swap next season.