Celcom Broadband??

Today, sis saw a promotion by Celcom broadband offering free usb modem but have to subscribe the broadband for a year then only the modem will belong to you. She plan to get it cause it is mobile means can use anywhere within the coverage. So, i search online to compare between Maxis and Celcom. Seems like both broadband also have complaints from customers about the speed and coverage. Still undecided will subscribe which one. Will find out more when free. Haha