I was there last week. First day: 6h drive to parking Kesselfall (at about 1km height) then about 6h walking to Hutte (at 2800m) which actually took about 8h due to many breaks enjoying the views. The trail from the parking lot to HS Haus is beautiful with numerous streams, waterfalls, tunnels, 3 places to buy nice food and drink. At Furthermoaralm you can fill water for free.
Second day from Haus to the summit and back I spent about 7h, although pure walking is about 2h in one direction. It is simply wonderful to enjoy every now and then looking and absorbing those beauties. I spent about an hour and a half on the summit, and about 1h around the edge of the glacier. I listened to the ice melting and numerous waterfalls flowing towards the lake.
The third day was the descent to the car. Again without hurry and with many breaks and enjoyment.
Technically the whole trip is difficult only on the shorter via ferrata right after the hut towards the summit (Mapy marked it with difficulty B, and Bergfex the other hardest parts of the trail with T4). Besides that, a lot of walking on narrow, exposed trails where you need to be maximally careful, but with a sure step you pass without problems in both directions.
There are big altitude differences to cover but for experienced in Julian Alps and Carnic Alps, this will not be a problem. There were even families with children. On the summit there was also a 10 year old.
I had mild symptoms of altitude sickness above 3400m. Slight dizziness, as if I had drunk a beer, nothing serious. Before this trip my highest altitude was 2 peaks at 3250m where I had no problems.
On the HS Haus website they regularly write the trail condition towards the summit i.e. from when there is no snow and no winter equipment needed. The hut is excellent. Has drinking water from the glacier. Food is exclusively vegetarian

Accommodation can be reserved online, and if everything is taken send email (as I did) or call, because often some people cancel the day before (as it was both days when I slept up there). They also accept SLO and HR membership card for discount
Definitely a 3 and a half thousander to recommend
