Is it safe and good to use?
I used it to claim my BCH and transfer them to an exchange to get rid of them. I imported my private keys into Electron Cash from my BTC wallet, AFTER I transferred all of the BTC out of that wallet on the main chain. The Electron Cash wallet worked for that purpose. I haven't used it since I saw the transactions hit the exchange.
If you already use Electrum as your BTC wallet, Electron Cash WILL pull up your existing wallet.dat, so you will have to be more careful. It MIGHT even pull up your BTC (core) wallet.dat, so it really is best to get it on a new computer.