The traffic isn't that high right now. Anything over a dollar in transaction fees will quickly send the Bitcoin. I think I spent under 5$ to send all my Crypto to my hardware wallet. Funds were in hardware wallet withing a minute. 



Looks legit to me but I'm not an expert coder. All you can do is do a search to find any bad sites that are known to have tampered wallets. Generally if you go to a coins official site the wallets are safe.