as long as the 2 tuners are on different sats yes,but it may depend what is open on the other sat.
cccam yes,not too sure at rewinding live tv but it has time shift.
addons i dont use that many yet needs more tinkering to know what each one does first.
epg is great,download once a week takes a min or 2 to gather info and load,and can even give you a full epg on the channel your on.
many have bought this box as its one of the best.

you can have both tuners on the one sat if you wish,think it can do a maximum of 6 recordings at once