I have been skiing the Watea 101s and 94s for several years and like the feel of Wateas, so I got a pair of Watea 98s last season. A couple of observations: they are a full twin tip, so my 186s actually have a contact length and ski like 171s. I mounted them on the center line and initially they would not carve on hard snow to save my life, but fortunately I used Neox bindings that allowed me to move them forward and back. After some experimentation I found them to carve best mounted 1.5 cm behind the line. Keep in mind that I am 6'5" and 215 lbs, so your results may vary.
Like all Wateas they are a fairly soft mellow flexing ski and work well in soft snow and bumps, and well enough on the groomers to get me back to the lift still smiling. Not much pop in the tails, but I am one of the minority who likes that. The older models (dark wood looking topsheets) had no rocker, just the boat hull tips, but the last model (looks like light wood with plant like stripes across the tips) have boat hull tips and a little early rise in the tips and tails giving them a smeary light forgiving feel. This year Fischer changed them to the Big Stix, which is basically the BC TT 98 without the boat hull tips.
I got 98s for soft snow and bumps and have skied a lot of both on them. I would really like these skis if they did not ski so damn short. I screwed up by failing to consider the full twin would remove a whole lot of effective length. One reviewer described them as an "anorexic powder ski," which I think is accurate. They are too wide and soft to be a good hard snow ski, and too narrow to be a great powder ski, but they do a decent job of being a 70/30 soft/hard snow ski.