My partner and I enjoyed a lovely week in Niederau in February 2015. Although the Apres was not as lively as in other resorts I loved the skiing. I made steps coming from the nursery slopes at the bottom to taking on some of the easier reds by the end of the week.
If you are an advanced skiier I would recommend either avoiding this resort, as the blacks are not very challenging, or taking the free bus to surrounding areas that have a greater variety of slopes.
In all, the atmosphere was good, the scenery at the top of the mountain was stunning and the cost was very reasonable.