I trade only with a local trader and I do not use any website like localbitcoins (even though I had 2 listings on the website for which I did not get any buyer). I did not find any website that can give me a better deal rather than a local trader who gives me the price I wish for my bitcoins.
Yeap, localbitcoins is great when you want to sell your BTC to get USD for your own purpose and not trading.