Go ahead. Bitcoinpaperwallet has a pretty decent reputation. It's safety should rely on you as you have to keep it in your hands/ most protected at all times. Otherwise there is no special meaning on having paper wallets.
Bitcoinpaperwallet has made it's name on the bitcoin wiki here
https://en.bitcoin.it/wiki/BitcoinPaperWalletAgreed. The site is reputable. You can go ahead and print a paper wallet or order supplies from the site.
An alternative would be
https://www.bitaddress.org which has a nicer paper wallet design in my opinion.