Glad that there will finally be a *W in Slovenia
From the name of it, it will be Mons. I've been there at a conference once. Quite nice, actually nicer than some of the higher brands hotels I've stayed at this year worldwide.
But the location isn't the best... It's near the highway about 10-15 minutes with a car to the city center. It is a nice green area, it's just a bit remote. Good for conferences though...