I've been there for a extended period of time, and if you are going on a trek I don't see why wouldn't want to go. Nepal deff has some major issues going on..their economy is horrible, they can barely produce enough power for their population, and the government is very unstable. But, if you are going there for a trek, these things will not make a great impact on you, and you will be able to experience what are you are going there for. Great mountains, great nature, extremely nice people out in the country side, and so forth. I was up in the mountains only for a short time, and I didn't go on a very high trek, but it was very peaceful and I would recommend it.
Go for it.