Internet Mobile

I need to have Internet Mobile connection and I'm searching Sunrise offers because I've a Sunrise Mobile USB Key. I need it in order to connect to my work during the weekend (oncall). But I would like to use too Skype in order to talk daily with my girlfriend, aprox. 30/60 minutes every night. I've taked a look at Sunrise website but I wasn't able to found there English information about their 'Internet mobile plans'. Anyone here could help me with this? I need too to know if I contract with them the Take Away Max plan I have to stay with Sunrise many months, and how many. I'd seen that they say that the traffic amount is unlimited, really? or have they a monthly limit for their plans? Do you think that I could use this Max plan in order to connect to my work and to use it with Skype daily? Anyone here knows if it will be better to take the Prepaid option? BTW: which company do you think is the Internet Mobile best company in Switzerland? Thanks in advance. Regards.