Any advice what are the conditions like?

Not Verbier, but just up the valley at Champery. Conditions are excellent. We are back there this weekend and fully expect to spend the whole time on the slopes.

It is a little early for deep pow, better late February through March. There is adaquate snow at elevations above 2200 meters and l think they had most of the runs open and lifts going. When you go make sure to get the 4-valley pass, it lets you go to Mt Fort and the Printze areas.
The link below loads in French, push the EN button at top right to load the English version. You should find about everything you need with it.