I have been using it for more than 6 months now. Never had a problem. My family and I take it everywhere we go, and the download speed is amazing as Optus pretty much covers anywhere within Australia. The customer service is also good, although I only spoke to them once when I was not able to locate some information in my account. HIGHLY RECOMMENDED!!

You get 2 months for free: one month for buying the modem and one month by using a referral code from an existing user. You can use mine: 175836