It's good for most winter hiking if You watch your forecasts carefully but in reality you need another ($$$) hardshell for winter, a sturdier, heavier, more windproof and more rain repellent shell in your arsenal. The people I know will use woll layers, then houdini shell - if the weather is normal and if you don't get cold easily this would work in most of the time. If You run cold, in general, the people I know will add an insulating layer on top and top it off with a hard shell especially when they get into exposed stretches.
In other words, the houdini is windproof but not bulletproof windproof, but it is much lighter, it is most breathable but not waterproof but who needs waterproof in the winter? --- not for well chosen day hikes especially.
It really depends on your main trips. Are you mostly going to do day trips, are you mostly going to do winter camping in a tent for 2+ nights per trip? etc etc...
Most of the time a soft shell is good enough for winter hiking. If You added a houdini to it it would be a great combination but if I planned to do a winter Presi traverse or gone up Katahdin I would want to have full G-Text/Event tops and bottoms.
For example I run hot - 90% of the time I wear one wool layer in good weather and no shell. Above tree line I add a houdini vest if it is a nice day. If it gets windy I add a soft shell jacket to it and if it's pushing me over then I add gtex jacket.
My SO - will wear two wool layers and a houdini if it is very nice out there, if it gets windier she will add a synthetic insulating anorak like the nano puff and if the wind pushes her around she adds a windproof parka.
Thanks Brambor....is it good for winter hiking during lots of snow as well?