Been there many times and I still want to return. There are plenty of incredibly nice places. There are routes for everybody there, from simple hiker to skilled mountaineer.
Started in Zarnesti, along the main ridge; night in the funny (looks like a soccer ball) shelter; reached La Om (highest peak), then descended since had run out of water.
Very nice mountains. We very passing it from Zarnesti to Muntii Izer Papusa. Warning for everybody: take a lot of watter with you - no one group that we have met had enough.