Danger like anything else there are always some intangibles that can cause hair shedding. I have been wearing about 1 year and 4 months , I ordered two HP's when I started , one was custom the other was stock. The stock I used first and got about 6 good months out of it. The custom has lasted about 9 months and if I didnt accidently poke a hole in it I probably would have got at least another month out of it although I would have been pushing it.

As far as maintenance goes I picked almost all of it up from Debbie and here are some of her suggestions

after washing let it damp dry in a towel before combing it
never blow dry it with hot air , my experience has been use it on cool when styling it
The more you wash it the more loss will occur , I usually wash it 2 times a week and results are good in my opinion
Some people here get over a year out of their pieces , personally if I get over 4 months and only order 3 a year its a workable situation for me

Hope this helps

Bill